Filter bag and closure flap for a filter bag

Abstract

The invention relates to a filter bag (100), in particular for a vacuum cleaner (200), comprising a filter material (10) for collecting vacuumed material (1) and a retaining plate (20) for mounting on a vacuum cleaner-side retaining nozzle (220). The invention also further comprises a closing flap (30) for a filter bag (100) according to the invention.

Description

[0001] The invention relates to a filter bag with the features of the independent claim relating to a filter bag, a closure flap with the features of the independent claim relating to a closure flap, a vacuum cleaner with the features of the independent claim relating to a vacuum cleaner, and a system with the features of the independent system claim.

[0002] Filter bags for vacuum cleaners are known, designed to collect vacuumed material, for example, within the interior of the filter bag. A filter bag can be positioned inside a vacuum cleaner, particularly between a vacuum cleaner tube (and / or hose) and a suction fan. This allows the vacuum cleaner to draw in material, such as sand, dust, stones, and the like, through the suction fan via the vacuum cleaner tube (or hose) and transport it into the interior of the filter bag. Preferably, the collected material can then remain in the filter bag, even after the vacuum cleaner has been switched off, and preferably until disposal.

[0003] However, the current state of the art has its drawbacks. For example, existing filter bags and sealing flaps may have less-than-ideal sealing properties. The seal between the filter bag and the vacuum cleaner's mounting nozzle may also be inadequate. The (unwanted) removal of already vacuumed-up debris from the filter bag, for instance, when or after the vacuum cleaner is switched off, cannot be prevented, or only partially prevented. In particular, debris can become jammed in the filter bag, the sealing flap, and / or the vacuum cleaner's mounting nozzle. Furthermore, the lifespan, reusability, tensile strength, and / or tear resistance may be insufficient. The design may be inadequate, for example, not sufficiently stable, rigid, and / or adaptable. Finally, the complexity may be high, for example, due to the use of numerous and / or complex components.This can lead to increased wear and / or a (at least partial and / or premature) loss of functionality, for example, due to the number and / or type of components. For instance, springs used to close a filter bag or flap can jam (e.g., due to debris), become wedged, and / or wear out (e.g., from rust). Furthermore, manufacturing effort, costs, and / or ease of use (also for the user) may be in need of improvement. Environmental friendliness, particularly due to complex or nonexistent recycling, and / or safety may also be in need of improvement. Additionally, noise levels and / or acoustic vibration may be excessive and / or unfavorable.

[0004] It is therefore an object of the present invention to overcome at least one of the disadvantages described above, at least partially. In particular, it is an object of the invention to provide an improved filter bag and / or an improved closure lid, which optimizes, in particular, the tightness, cost, service life, strength, environmental friendliness, and / or safety. Furthermore, it may be an advantageous object to prevent or reduce wear, complexity, manufacturing effort, and / or jamming of the suctioned material.

[0005] The foregoing problem is solved by a filter bag with the features of the independent claim relating to a filter bag, a closure flap with the features of the independent claim relating to a closure flap, a vacuum cleaner with the features of the independent claim relating to a vacuum cleaner, and a system with the features of the independent system claim. Further features and details of the invention will become apparent from the dependent claims, the description, and the drawings. Features and details described in connection with the filter bag according to the invention naturally also apply in connection with the closure flap according to the invention and / or in connection with the vacuum cleaner according to the invention and / or in connection with the system according to the invention, and vice versa, so that the disclosure regarding the individual aspects of the invention always makes, or can make, reciprocal reference.In particular, advantages described within the first, second, third and / or fourth aspect also apply to the first, second, third and / or fourth aspect.

[0006] The above task is solved according to a first aspect by a filter bag, in particular for a vacuum cleaner, comprising a filter material for collecting suctioned material and a retaining plate for arranging it on a vacuum cleaner-side retaining nozzle.

[0007] The filter bag, and in particular the filter material, can be designed to collect material vacuumed up, for example, by a vacuum cleaner. The filter material can be bag-like and / or sack-like. In other words, the filter material can have an opening and otherwise be shaped like a bag or sack. The filter material can have and / or define an interior space into which the vacuumed material is preferably collected. Preferably, the filter material is at least partially permeable to air, for example, by being perforated. The filter material can be made of, for example, plastic, paper, and / or non-woven fabric.

[0008] The filter bag can preferably be arranged in or on a vacuum cleaner, preferably on a retaining nozzle on the vacuum cleaner side (see below). In an operating state, the filter bag can be arranged in or on the vacuum cleaner. In particular, the filter bag can be designed to collect and / or (at least temporarily) retain the debris sucked up by the vacuum cleaner, especially after successful installation, preferably also when or after the vacuum cleaner is switched off. It can be provided that a (reversibly removable) lid of the vacuum cleaner closes an interior compartment in which the filter bag can be arranged, in particular installed. The lid can then close the vacuum cleaner, thus protecting the filter bag inside the vacuum cleaner (e.g., from external forces).

[0009] The filter bag can be (at least partially) replaceable, recyclable, and / or biodegradable. This can advantageously improve its environmental friendliness. For example, the filter material, the retaining plate, the spout, and / or the closure flap can be designed to be replaceable, recyclable, and / or biodegradable.

[0010] In this process, material to be vacuumed up can be drawn in, particularly along a suction direction. A suction direction can therefore (essentially) correspond to the (averaged) movement of the air, which moves, in particular, through the vacuum cleaner, a vacuum cleaner-side mounting nozzle, the mounting plate, a through-opening in the mounting plate, the nozzle (see below), the collar, and / or the filter bag. Within the scope of the invention, a reference to the suction direction can refer (essentially) to the suction direction at the level of the relevant feature or component. Thus, the suction direction can be (exclusively) linear, for example, when the material being vacuumed is moved: along or through a straight (e.g. tubular) suction tube, along or through a straight (e.g. tubular) vacuum cleaner-side retaining nozzle, through a retaining plate, in particular through a (straight) through-opening of the retaining plate, along or through a straight (e.g. tubular) nozzle, along or through a filter bag, and / or straight or linearly in the direction of a suction blower.

[0011] It may also be provided that the suction direction is curved (at least in sections), for example if the nozzle is designed as an angled pipe.

[0012] The retaining plate can be flat, planar, and / or planar, for example, like a (flat) cuboid or a disc. The retaining plate can be arranged (essentially) perpendicular to a suction direction, particularly when the filter bag is located in a vacuum cleaner. Preferably, the retaining plate can be designed to allow for attachment, especially reversible attachment, to a vacuum cleaner-side mounting nozzle. This facilitates maintenance, particularly the replacement of the filter bag (e.g., by the user).

[0013] The mounting plate may have a through-opening designed to allow air and / or material to pass through, particularly to allow it to flow into the filter bag. The through-opening can be designed to allow airflow in one direction. It may be essentially circular and / or located centrally in the mounting plate. The through-opening may, particularly during operation, be essentially flush and / or aligned with a vacuum cleaner-side mounting nozzle, a vacuum cleaner tube, and / or a vacuum cleaner hose. In other words, the material can be drawn in via a vacuum cleaner-side mounting nozzle to and / or through the through-opening.

[0014] The retaining plate can have a handle designed to facilitate the insertion and / or removal of the filter bag, particularly the retaining plate itself. For example, a user can pull the filter bag out using the handle after opening the vacuum cleaner lid. The handle can be bonded to the retaining plate. It can be attached to the retaining plate, for example, via a film hinge. The handle can be designed to be hinged and / or pivotable, particularly by means of a film hinge. It can be designed to pivot between 0° and 180°, particularly between 45° and 135°, preferably between 80° and 100°, ideally by 90°, relative to the retaining plate. The handle can be (comparatively) large and / or robust.Furthermore, the handle can be arranged in a space-saving manner, particularly inside the vacuum cleaner, for example, when it is closed (by a lid). In the closed state of the vacuum cleaner, especially with the lid closed, the handle can therefore be positioned (essentially) parallel to the lid.

[0015] The filter material, particularly a collar-shaped section, can be attached and / or fixed to the mounting plate. This can be reversible (e.g., for reusing the mounting plate and / or replacing the filter material) or irreversible (e.g., for increased stability and / or sealing). The filter material can be glued to the mounting plate (reversibly or irreversibly). This can allow for particularly simple, fast, and / or cost-effective manufacturing. For example, a (new) filter material can (reversibly) replace a used filter material by (re)gluing it. Alternatively, the filter material can be (irreversibly) welded to the mounting plate. This can allow for a particularly robust and / or durable construction.

[0016] The filter material can have a filter ring, which is preferably arranged on or around a (single) opening of the filter material. The filter ring can stabilize the filter material, particularly near the opening. This helps to maintain the shape of the filter material (better). Advantageously, the filter ring allows for simpler, more intuitive, and / or more robust arrangement, especially attachment, of the filter material, for example, to a mounting plate, a nozzle, and / or a collar of the nozzle (see below). The filter ring can preferably be arranged over a flat surface on or around the nozzle and / or the collar. The filter ring can be designed as a disc or perforated disc. This can allow for improved (flat surface) attachment to a collar, especially since the width of the filter ring and / or the collar provides more surface area for a fastening element, e.g., an adhesive bond.Alternatively or additionally, the filter ring can extend longitudinally along the suction direction. The filter ring and / or the collar can be adapted to the shape of the nozzle and / or the mounting plate. For example, the filter ring can be designed to slide onto the nozzle. Preferably, the filter ring can be adapted to (and / or identical with) the shape of the collar, and / or vice versa. This allows for particularly simple, intuitive, and / or robust attachment. The filter ring can be bonded to the filter material. The filter ring can be made of the same material as the filter material. For example, the filter ring can be folded once or multiple times, or have several layers of filter material. Alternatively or additionally, the filter ring can have a reinforcing material, such as plastic and / or metal. This allows for greater robustness and / or dimensional stability.The filter ring can be glued, welded, pressed, stapled and / or clamped to the filter material.

[0017] Within the scope of the invention, it can be advantageous for the retaining plate to have a nozzle on which the filter material is arranged, the nozzle preferably having a non-cylindrical shape.

[0018] The mounting plate and the nozzle can be bonded together. This can advantageously result in particularly high robustness. For example, they can be manufactured (together) using an injection molding process and / or 3D printing. Alternatively, the mounting plate and the nozzle can be connected by friction and / or form-fitting. This allows them to be manufactured separately, made of different materials, and / or replaced separately, which can advantageously improve environmental friendliness. The nozzle can preferably be glued and / or welded to the mounting plate. Alternatively or additionally, it is conceivable that the nozzle is reversibly attached to the mounting plate, for example, by screws. The mounting plate can have a mating nozzle (e.g., flush and / or aligned with the through-hole) onto which the nozzle can be pushed and / or clicked into place.Furthermore, the mating nozzle can have a mating thread onto which a thread of the nozzle can be arranged, in particular screwed on. The nozzle can preferably be arranged flush and / or aligned with or on a through-opening of the mounting plate. Preferably, the material to be suctioned can pass through the mounting plate (and / or the mating nozzle), in particular through the through-opening (or the mating nozzle) and / or the nozzle, and in particular be drawn through it.

[0019] The mounting plate can (only) have the nozzle, and in particular, may otherwise have no (geometric) extension. For example, this can be the case if the nozzle has a shape, e.g., elliptical-paraboloidal, which is (solely) designed to be arranged on a vacuum cleaner-side mounting nozzle (e.g., by "simply" pushing it on), in particular without requiring a shape of the (remaining) mounting plate extending, for example, perpendicular to the suction direction. Alternatively (or preferably), the mounting plate can have a nozzle, which may be designed like a collar. This allows, for example, the mounting plate to be arranged like a rail on a vacuum cleaner-side mounting nozzle, for example, perpendicular to a suction direction, while in particular the nozzle forms a (geometric) shape (essentially) along the suction direction.This can result in a particularly stable structure and / or easy maintenance (especially changing the filter bag).

[0020] The nozzle and / or the mounting plate may be designed to allow for attachment, in particular reversible attachment (e.g., by pushing it on), to a vacuum cleaner-side mounting nozzle. This can facilitate maintenance, especially the replacement of the filter bag (e.g., by the user).

[0021] The nozzle can be designed (at least partially, preferably completely) symmetrically, in particular rotationally symmetrically (e.g., with respect to a longitudinal axis and / or suction direction). This can enable simple and / or cost-effective manufacturing. The nozzle can have a round cross-section, in particular perpendicular to a longitudinal axis and / or axis of symmetry of the nozzle. The longitudinal axis can be formed (essentially) along a suction direction and / or axis of symmetry. The nozzle can be designed (at least partially) as a tube and / or as a pipe, in particular the diameter can vary. It is preferable that the diameter varies, in particular along a longitudinal axis, and in particular progressively or continuously.In other words, the nozzle may not have a constant diameter, particularly (even) in sections, and / or may be cylindrical. Preferably, the longitudinal axis, particularly the axis of symmetry, of the nozzle may not be parallel to a surface of the nozzle, or at least not predominantly parallel. In other words, the nozzle may not be cylindrical, or at least not predominantly cylindrical.

[0022] The nozzle can be bent (at least partially, preferably completely) and / or designed as an angled tube. Preferably, the diameter can be constant to advantageously enable simple and / or cost-effective manufacturing. This can be advantageous to reduce and / or circumvent installation space limitations, for example, if the vacuum cleaner lid has a large thickness. Furthermore, this can be advantageous to design the suction direction (non-linearly), which can particularly improve the (self-regulating) opening, closing, and / or sealing of a flap (see below), e.g., through improved airflow characteristics and / or optimized pressure distribution. For example, the air velocity in a section of an angled tube located further out can be greater than in a section located further inward (closer to a center point, e.g., if a torus-shaped angled tube is assumed).The nozzle can have a radius of curvature (at least in sections), preferably constant. This can simplify manufacturing. Alternatively, the radius of curvature can vary, for example, increasing or decreasing linearly, allowing for advantageous adaptation to the available installation space. The nozzle or angled pipe can have a pipe angle between 0° and 270°, for example, between 1° and 180°, particularly between 3° and 90°, preferably between 5° and 60°, most preferably between 10° and 45°, ideally between 15° and 30°.

[0023] The nozzle can be cylindrical (at least partially, preferably completely). This can enable simple and / or cost-effective manufacturing.

[0024] The nozzle can be designed (at least partially, preferably completely) as an elliptical shape. This can advantageously optimize stability, particularly along one axis (the longer semi-axis). It can also advantageously optimize the installation space, particularly due to a flatter design (along the shorter semi-axis). At the same time, the throughput can be kept constant and / or increased, for example, compared to a round nozzle.

[0025] Preferably, the nozzle can be designed to be tapered and / or widened (at least partially, preferably completely), and in particular, the cross-section can be tapered and / or widened. For example, the nozzle can be conical, funnel-shaped, paraboloid, and / or hyperbolic. A tapering or narrowing, especially along the suction direction, can be advantageous to increase the pressure and / or the (inflow) velocity (of the air or the material being suctioned), for example, in the direction (along the suction direction) of a and / or at the level of a closure flap. This allows the flap to open, close, and / or seal more quickly. Furthermore, jamming of the closure flap, for example by the material being suctioned (e.g., coarse or irregularly shaped material such as stones), can be prevented and / or reduced.Improved sealing can (especially in principle) prevent and / or reduce the (undesired) removal, falling out, and / or leakage of a filter bag. Alternatively or additionally, the nozzle can be widened or extended, particularly away from a (along the suction direction) and / or at the level of a closure flap. Advantageously, a filter bag, especially a filter material, can be opened and / or spread open. This advantageously optimizes and / or maintains the shape of the filter bag (e.g., when empty or partially empty). In particular, clogging and / or jamming can be prevented and / or reduced, especially in the front part of the filter bag (in the suction direction). The nozzle can be designed to be tapered and widened, particularly repeatedly.For example, it can be designed with a hyperbolic-paraboloid and / or elliptical-paraboloid shape. Advantageously, this allows the pressure to be increased, particularly at the inlet to the filter material, for example, at the level of a closure flap. This makes it easier to open the closure flap. Furthermore, or simultaneously, it can cause the filter bag or filter material to expand and / or be shaped. Thus, the advantages can be combined.In addition, a hyperbolic-paraboloidal design can be advantageous to promote fanning of the filter bag, prevent jamming of the closure flap with filter material, enable higher tensile strength of the filter bag with respect to the retaining plate (especially due to a reduced peeling effect), better load-bearing capacity of a welded joint (which is more likely to be subjected to shear stress), higher stiffness of the welded surface (which can allow for greater welding energy), and / or higher stiffness of the welded surface, which can in particular reduce the effort required to support the back (of a hard component) during welding.In addition, an elliptical-paraboloidal design can be advantageous to provide a threading aid for the filter bag, in particular to position it on a welding surface, to allow a higher stiffness of the welding surface (which can allow greater welding energy), and / or to allow a higher stiffness of the welding surface, which in particular can allow a reduced effort to support the back (of a hard component) during welding.

[0026] It is particularly advantageous if the nozzle is designed as a tapered pipe elbow. The nozzle can be (at least partially, preferably completely) bulbous, and may have a groove and / or an undercut. This can be implemented completely or partially along the circumference. This can (especially at this point) facilitate a simplified (e.g., directly visible to the user) and / or more robust arrangement, in particular the attachment, of the filter material to the nozzle. For example, the filter material can be pressed and / or snapped into or into the nozzle. This can improve the seal and / or prevent the filter material from being pulled off. This allows for reversible attachment of the filter material to the nozzle and / or optimizes or reinforces irreversible attachment.

[0027] The nozzle can have a rectangular and / or square cross-section. This can allow for particularly simple and / or cost-effective manufacturing.

[0028] Within the scope of the invention, it is conceivable that the retaining plate has a nozzle to which the filter material is attached by a fastening means, in particular an adhesive bond and / or a welded connection.

[0029] Preferably, the nozzle can have a collar, in particular an angled one. The collar can be designed as a material extension extending from the nozzle. The collar can be arranged at one end of the nozzle, preferably along the suction direction, in particular at an end facing away from the vacuum cleaner-side mounting nozzle. The collar can be arranged (essentially) parallel to a (closed) closure flap. The filter material can be arranged on the nozzle and / or the collar, in particular by means of the fastening device. In this respect, the corresponding explanations (for example, below) can apply to the nozzle and / or the collar. The filter material can be arranged (only or exclusively) on the collar, in particular if the collar is provided at all. Accordingly, it can be provided that there is no contact or fastening of the filter material to the nozzle.This design advantageously allows for particularly simple manufacturing. For example, the filter material can be attached directly to the collar using the fastening device. This enables a favorable, flat attachment (see also above). The collar can be angled relative to the nozzle and / or the mounting plate. For example, the collar can have an angle between 0° and 90°, particularly between 1° and 80°, for example between 5° and 70°, preferably between 10° and 50°, most preferably between 15° and 40°, and ideally between 20° and 30°, relative to the longitudinal axis of the nozzle, the suction direction, and / or the mounting plate. Advantageously, this prevents unwanted and / or unintentional interference (e.g., by a user), especially from above when the lid is open, with or into the nozzle or the closure flap.

[0030] Preferably, the fastening device can fully secure the filter material to the nozzle and / or collar. This allows for a particularly robust and / or durable connection. Alternatively, fastening can be achieved in sections, particularly along the circumference of the nozzle. This can be advantageous for easier removal of the filter material from the nozzle and / or collar, for example, to attach new filter material. Preferably, the fastening device can be positioned externally on the nozzle and / or collar. The fastening device can be designed to be reversibly detachable. Advantageously, this allows for easy replacement. Alternatively, the fastening device can permanently secure the filter material (and / or the filter ring) to the nozzle (or collar) and / or only by destroying it. Advantageously, this can achieve particularly high durability, robustness, and / or a tight seal.The filter material, in particular a filter ring (see above), can be flush-mounted on the nozzle and / or collar and, in particular, secured, for example, by an adhesive bond and / or weld. This can be particularly simple and / or cost-effective. Alternatively or additionally, the filter material and / or a filter ring can be slid onto the nozzle and / or collar (and, in particular, additionally bonded in a reversible manner). This can result in a reversibly detachable connection that provides a good seal, allows for replacement, and / or improves environmental friendliness. For example, (only) the filter material (and / or the filter ring) can be disposed of, preferably in a biodegradable form, while the other components, although replaceable, do not necessarily have to be disposed of.This allows for different disposal methods; for example, the filter material (and / or the filter ring) can be biodegradable, while the nozzle, collar, and / or retaining plate, in particular, can be made of plastic and / or metal. The nozzle can extend (at least partially) into the filter material, especially into an interior formed by the filter material, preferably when the filter material is arranged on the nozzle and / or collar. Alternatively or additionally, the fastening device can comprise a band, particularly elastic (e.g., rubber), (plastic and / or plastic fabric), a cord, a (twistable) wire, a ratchet, a clamp, and / or a cable tie, which can be designed to be reversibly releasable. The fastening device can have one (or more), preferably manually operated, fastening unit(s) (e.g.,Knurled nut) with which the fastening device can be at least partially secured and / or held together. In this way, for example, a clamp, a strap, a ratchet, and / or a cable tie (reversibly releasable) can be fixed or secured. Alternatively or additionally, the fastening unit(s) can attach the filter material and / or the filter ring to the nozzle (and / or collar), for example, via designated (screw) holes. The filter material, in particular a filter ring, can preferably be fixed between the nozzle (and / or the collar) and the fastening device by friction and / or form-fitting means, in particular by clamping. Alternatively or additionally, the filter material and / or the filter ring can be welded to the nozzle (and / or collar). This advantageously allows for a particularly robust fastening and / or an optimized seal.Alternatively or additionally, the filter material and / or the filter ring can be bonded to the nozzle (and / or collar) in a material-bonded manner, in particular by fusing. This advantageously enables a particularly robust attachment and / or an optimized seal. Furthermore, this can shape and / or fix the filter bag, in particular the filter material, at least partially (in particular by first melting and then solidifying). The nozzle can have a mounting groove, at least partially, preferably completely, in which the filter material, the filter ring, and / or the fastening element can be (at least partially) arranged and / or inserted. This can result in a particularly advantageous seal, robustness, and / or durability, preferably while simultaneously providing replaceability and / or environmental compatibility.This can further increase safety and / or ease of use, as it allows for correct and / or simple attachment. Alternatively or additionally, the filter material, especially the filter ring, can have a bayonet fitting, enabling reversible attachment to the nozzle and / or collar. This can advantageously provide a robust, replaceable, and / or intuitive connection option. The fastening device can be designed to clamp the filter material to the nozzle and / or collar. The fastening device can include a ring, preferably a closed, and preferably elastic ring, which is provided separately or integrated into the fastening device and can be positioned between the fastening device and the nozzle or collar. The filter ring itself can be designed as an elastic ring.This can enable a particularly good seal. Furthermore, an elastic ring can still provide a good seal even if, for example, the fastening element (such as a clamp) exerts less clamping force over time and / or due to heat, particularly due to initial compression. It can also be designed that the ring and / or the filter ring is shrinkable, especially radially (inwards) shrinkable, preferably under heat. It can therefore be a shrink ring or shrink tubing. This can advantageously enable a particularly stable and / or tight connection. A combination of a shrinkable fastening element, ring, and / or filter ring with a groove or undercut on the fitting can be particularly advantageous and, in particular, result in a particularly robust and / or tight connection.Alternatively or additionally, the nozzle and / or collar may also have a shrink film, with which it may be wrapped. Alternatively or additionally, the fastening element may include a (plastic) sealant, which may be arranged, in particular, for sealing between the fastening element and the nozzle and / or collar. The fastening element may include a two-component adhesive (or two-component injection molding), which may preferably be combined with an (elastic) ring, sealing element, and / or filter ring, in particular to fasten (bond) it.

[0031] Within the scope of the invention, it may be provided that the retaining plate has a nozzle, wherein the nozzle, in particular a longitudinal axis of the nozzle, is designed at an angle relative to the retaining plate, wherein in particular an angle between the retaining plate and the nozzle, in particular between the retaining plate and a longitudinal axis of the nozzle, is formed as acute or obtuse.

[0032] The longitudinal axis can be arranged centrally and / or midway (relative to the nozzle). The longitudinal axis can be perpendicular to a suction direction and / or flow direction. The longitudinal axis can have or be an axis of symmetry, particularly if the nozzle is symmetrically designed. In this case, the longitudinal axis can be perpendicular (especially at an angle of 90°) to the mounting plate. This can advantageously enable simple and / or cost-effective manufacturing. Preferably, the longitudinal axis can have an angle to the mounting plate, which can be acute or obtuse. This allows the design to be adapted, the installation space to be optimized, and / or installation space requirements, e.g., imposed by the vacuum cleaner, to be taken into account. This also allows the nozzle to be designed to point downwards.This prevents the likelihood of (unwanted) removal, falling out, and / or trickling out of the filter bag, preferably even if the closure flap is partially leaking. Advantageously, this also prevents the closure flap from jamming, especially since gravity can cause the collected material to enter the filter bag, particularly when the closure flap is closed slowly, and preferably prevent it from remaining in the nozzle.

[0033] It is also conceivable that the retaining plate has a nozzle, wherein the nozzle has at least a partial undercut to preferably enable improved attachment of the filter material to the nozzle.

[0034] The nozzle may be provided with one, two, or more undercuts. Preferably, the (or each) undercut may be designed to allow adjustment of the nozzle, particularly in a grid-like manner, especially relative to the retaining plate and / or the collar. In other words, the nozzle may be adjustable, particularly by allowing the retaining plate and / or the collar to engage with different undercuts. The length of the nozzle may therefore be adjustable to advantageously provide adjustability in order to reduce and / or prevent excessive clogging and / or jamming of certain materials. Alternatively or additionally, the (or each) undercut may be designed to at least partially accommodate the filter material, filter ring, and / or fastening element.This can advantageously allow for improved fastening and, in particular, simultaneous replacement. Accordingly, the undercut(s) can have a dual function, specifically for fastening on the one hand and for adjustability on the other.

[0035] Within the scope of the invention, it is optionally possible for the retaining plate to have a nozzle, wherein the retaining plate and / or the nozzle has at least a section of a counter rail, a counter thread, and / or a counter click connection, which can be arranged in particular on a rail, a thread, and / or a click connection of a vacuum cleaner-side retaining nozzle (see below).

[0036] A counter rail can preferably form a positive-locking and / or force-locking connection with a rail. This allows the filter bag to be reversibly and detachably attached to the vacuum cleaner-side mounting nozzle, particularly via the retaining plate and / or the nozzle. Preferably, the filter bag can be inserted or removed from above, advantageously intuitively.

[0037] A mating thread can preferably form a positive-locking and / or force-locking connection with a thread. This allows the filter bag to be reversibly and detachably attached to the vacuum cleaner's mounting nozzle, particularly via the retaining plate and / or the nozzle. Preferably, the filter bag can be inserted, for example, from above, and then at least partially twisted so that the thread and the mating thread engage. Advantageously, this can provide a particularly good seal. This can prevent and / or reduce pressure loss and / or loss of performance. Preferably, the thread and / or mating thread can be designed as a bayonet fitting, and the other component as a complementary counterpart.

[0038] It is also conceivable that the filter bag has a seal, with the seal being arranged between the filter material and the retaining plate, in particular between the filter material (and / or filter ring) and a nozzle of the retaining plate.

[0039] Alternatively or additionally, a seal can be arranged between the collar and the filter material (and / or filter ring). The seal can advantageously provide an improved seal and / or prevent the (unintentional) removal of suction material. The seal can be cylindrical, (partially) conical, torus-shaped, and / or have an elliptical cross-section.

[0040] Within the scope of the invention, it is optionally possible for the filter bag to have a closing flap which is arranged on the retaining plate, or in particular on a nozzle and / or collar of the filter bag, wherein the closing flap is preferably designed to prevent the removal of material from the filter bag.

[0041] Preferably, the closure flap is designed to provide a high closing force in the closed state and / or a low closing force in the open state.

[0042] The closing flap can be located on the side of the filter bag and / or on the side facing away from the vacuum cleaner's mounting nozzle. It can also be arranged within the nozzle, for example, centrally (in the direction of suction). This provides particularly good protection for the closing flap and / or ensures that it can be opened and / or closed, for example, because no material in or out of the bag can block or jam the closing flap. Alternatively, the closing flap can be located on the nozzle and / or collar, particularly at the level of and / or parallel to a collar (when the closing flap is closed). Finally, the closing flap can be located within the filter material, particularly in an interior space within the filter material.The nozzle can extend into the filter bag, particularly into the filter material and / or an interior area of ​​the filter material, at least partially. Preferably, the closure flap can be permanently attached to or within the nozzle and / or collar, for example, by a bonded connection. This can enable particularly simple and / or rapid manufacturing. Alternatively or additionally, welding is conceivable, which allows for a particularly robust connection and / or the use of different materials. Alternatively or additionally, gluing is conceivable, which advantageously enables simple and / or cost-effective manufacturing. Furthermore, different materials can be used. Additionally, maintenance and / or repair can be simple and / or cost-effective, especially if the closure flap tears off (e.g., due to wear or material fatigue).An arrangement on the mounting plate can allow for the replacement of the nozzle, including the filter material. An arrangement on the nozzle and / or collar makes it possible to manufacture the mounting plate from a different, particularly harder and / or stiffer, material.

[0043] The spigot and / or collar may be designed to have a (one-sided) extension, particularly to secure and / or facilitate the opening and / or closing of the closure flap. This extension may be located on the opposite side of a connecting section, a leading edge, and / or a groove. This can be combined, for example, with an angled collar.

[0044] The filter bag may preferably have a closure flap according to the second aspect.

[0045] Alternatively, the closure flap or a further closure flap can be arranged on a retaining nozzle on the vacuum cleaner side. A further closure flap, which is designed to close more easily, for example through increased restoring force (e.g., reinforced ribs) and / or perforation stiffness, can improve the sealing of the other closure flap, particularly the one located further back along the suction direction, especially since little or no vacuumed material reaches it, as this can preferably be prevented by the further closure flap.

[0046] The above problem is solved according to a second aspect by a closure flap according to the invention for a filter bag, preferably according to the first aspect, in particular for a vacuum cleaner, preferably according to the third aspect, wherein the closure flap is designed to open or close the filter bag.

[0047] Accordingly, the closure flap can be designed to prevent and / or reduce the (unwanted) removal, falling out, and / or trickling of vacuumed material from the filter bag. This can preferably be achieved by an opening and / or closing mechanism, particularly a reversible one. Alternatively or additionally, the closure flap can be designed to keep the filter bag open and / or closed. Preferably, the closure flap can be at least partially, and preferably completely, open or be opened when the vacuum cleaner is switched on or is switched on, thus advantageously allowing vacuumed material to pass through the closure flap and enter the filter bag.Preferably, the closing flap can be at least partially, and preferably completely, closed when the vacuum cleaner is switched off, thus advantageously preventing vacuumed material from passing through the closing flap and entering and / or exiting the filter bag. Furthermore, the removal of vacuumed material can be avoided, in particular, when the vacuum cleaner, especially its blower, is switched off, and / or the filter bag has been removed or is not attached to the vacuum cleaner's retaining nozzle.

[0048] This results in the same advantages with regard to a closure flap according to the second aspect as have already been described with regard to a filter bag according to the first aspect.

[0049] Furthermore, it may be provided within the scope of the invention that the closure flap is movable relative to the filter bag, in particular to a filter material, a retaining plate and / or a nozzle of the filter bag, in particular pivotable and / or rotatable.

[0050] The term "pivotable" can be understood in analogy to a garage door. The locking flap can preferably be attached on one side, particularly at an outer (circumferential) edge, for example via a connecting section, preferably (at the bottom) to the mounting plate, the spigot, and / or the collar. Here, the directional terms bottom, top, front, back, right, and / or left, which in particular form a (triaxial) right-handed system, can be used as examples, and refer specifically to an operating state in which the filter bag is arranged in a vacuum cleaner. Preferably, the locking flap is otherwise freely movable, particularly relative to the spigot. The locking flap can be attached at the bottom, preferably when installed. This can advantageously be combined with a downwardly angled and / or bent spigot, which can improve opening and / or closing.This can improve the seal. Alternatively, the closure flap can be attached at the top, which advantageously uses gravity when closing to allow for faster closing and / or improved sealing.

[0051] With regard to the present invention, it is conceivable that the closure flap is designed to open towards and / or into an interior of the filter bag and / or the filter material.

[0052] The interior can be surrounded by the filter material. The closing flap can open and / or close along and / or perpendicular to the suction direction. Preferably, the closing flap can be arranged substantially perpendicular to the suction direction when the vacuum cleaner (especially the suction fan) is switched off. When or after the vacuum cleaner is switched on, which in particular starts the suction fan, the closing flap can (begin to) open. When the vacuum cleaner is switched on, especially after a short time, the closing flap can be arranged substantially angled (especially at an acute angle) and / or perpendicular to the suction direction.

[0053] Furthermore, it is conceivable that the closure flap, especially in sections, has an elastic material.

[0054] Preferably, the closure flap can be designed essentially like a lid. The closure flap can be planar, flat, and / or slabby. The closure flap can have a thickness between 0 and 5 mm, for example, between 0.3 and 4 mm, particularly between 0.5 and 3 mm, preferably between 0.7 and 2 mm, and most preferably between 0.9 and 1.5 mm. The closure flap can have a rectangular, square, rounded, and / or round shape. Preferably, the closure flap can be adapted to the shape and / or cross-section of the nozzle, in particular such that the closure flap can completely close the nozzle and / or the collar (in the closed state).

[0055] An elastic material can advantageously prevent the flap from remaining completely or predominantly open, for example, due to jamming (by debris). In other words, the flap can be designed to close around debris that has become jammed, particularly within the flap, thus advantageously achieving a (reduced) seal. This allows for a better seal than is possible with a rigid, hard, and / or stiff flap. Furthermore, this enables, in particular, automatic clearing. Jammed debris can be removed (automatically) during the switching off, switching on, and / or operation of the vacuum cleaner. This cannot function, or can only function less effectively, with rigid, hard, and / or stiff flaps.

[0056] The elastic material can be a plastic, in particular an elastomer, e.g., (vulcanizates of) natural rubber and / or silicone rubber. Alternatively or additionally, the elastic material can be made of rubber. Preferably, an elastic material is not susceptible to damage, or is more susceptible to damage, for example, by (very) hard absorbed material, such as a stone or diamond.

[0057] Within the scope of the invention, it can be advantageous that the closure flap is formed in one piece, in particular of a single material (for example, a plastic injection molded part with only one component or a plastic injection molded part with at least two components), and in particular has a one-piece and / or integrated closure mechanism.

[0058] The closure flap can be designed as a single piece (in particular, all elements of the closure flap are materially bonded together, for example, by an injection-molded part). This can simplify manufacturing. The closure flap can also be designed as a single piece and / or materially bonded to the spout and / or collar. This can also simplify manufacturing, for example, using an injection molding process. A single-piece (material-single) design can improve recycling, as only one material needs to be disposed of. Fewer parts can be used, which can simplify production. Advantageously, the force (distribution), sealing, closing behavior, opening behavior, and / or shape can be designed depending on the shape, geometry, and / or material, especially during development (including further models).It may be provided that no (additional) elastic element, e.g., a spring, is used. Preferably, the opening and / or closing of the closure flap can be enabled by the (switching on and / or off) of the suction fan, the shape of the closure flap, and / or the material properties of the closure flap, in particular its stiffness. A closure mechanism may have (at least) a connecting section, a leading edge, a groove, a reinforcing rib, a transverse rib, a longitudinal rib, and / or an inclined rib. It may be provided that the closure flap has at least one predetermined breaking point and / or reinforcement point (in particular, holes for cable ties, adhesive, or the like). This allows the elasticity of the closure flap to be (subsequently) modified, adjusted, and / or increased. For example, a predetermined breaking point can be opened if the elasticity is too low and / or the stiffness too high, e.g.,due to material aging. A predetermined breaking point can be designed, for example, as a pre-marked and / or pre-perforated section in a rib, such as a reinforcing rib, a transverse rib, a longitudinal rib, and / or an oblique rib. Alternatively or additionally, the elasticity of the closure flap can be (subsequently) modified, adjusted, and / or reduced. For example, a reinforcement point can be created or extended if the elasticity is too high and / or the stiffness too low. For this purpose, a reinforcement point can be designed as a discontinuous rib, such as in a reinforcing rib, a transverse rib, a longitudinal rib, and / or an oblique rib. By connecting the rib sections, for example, by closing or bridging the discontinuity, the stiffness can be increased. For this, a hardening adhesive and / or melting / welding can be used, for example.

[0059] Within the scope of the invention, it is conceivable that the closure flap has a groove, in particular in a lower section of the closure flap, wherein the groove is designed to facilitate opening and / or closing the closure flap, in particular relative to the retaining plate.

[0060] Preferably, the connection section, the leading edge, the groove, the reinforcing rib(s), the transverse rib(s), the longitudinal rib(s), and / or the inclined rib(s) are arranged on one (single) side of the closure flap (preferably facing the filter material and / or away from the dust-side retaining nozzle), are bonded together, and / or are formed in one piece. Accordingly, these components can be integrated. The other side (upstream side) can preferably be smooth. Alternatively or additionally, application, (irreversibly removable) fastening, e.g., by gluing, two-component fastening, in particular two-component injection molding, and / or welding, is conceivable. This can increase stability and / or allow for the use of different materials (e.g., different materials for the closure flap and ribs).For example, the reinforcing rib(s), transverse rib(s), longitudinal rib(s), and / or diagonal rib(s) can be made of a (different) plastic and / or metal, e.g., hard plastic and / or spring steel. This can provide improved robustness, stiffness, durability, and / or resilience. The reinforcing rib(s), transverse rib(s), longitudinal rib(s), and / or diagonal rib(s) can be designed to have at least one predetermined breaking point and / or reinforcement point, particularly to withstand aging processes. For example, (aging-related) hardening can be (at least partially) compensated for by the (opening) of at least one predetermined breaking point. Alternatively, (aging-related) softening and / or reduced stiffness can be (at least partially) compensated for by the hardening of at least one reinforcement point. For example, a reinforcement point can have a break in a rib.This can be closed, for example by gluing and / or heating (e.g. welding) to increase stiffness.

[0061] Preferably, the connecting section can have the groove (or vice versa). The connecting section and / or the groove can be designed as a film hinge. The groove can have a material recess. The groove can preferably be configured to facilitate opening and / or closing the closure flap. The groove can preferably be formed essentially perpendicular to the suction direction, in particular from left to right. The groove can be arranged in a lower section of the closure flap. The closure flap can have: a lower section, in particular at the very bottom of the locking flap, a middle section, in particular in the middle of the locking flap, and / or an upper section, in particular at the very top of the locking flap.

[0062] The groove can preferably be arranged or designed close to and / or next to the connecting section. The groove can be configured so that the closure flap, particularly when opening and / or closing, is flexed, collapses, and / or has a defined weak point or "designed flex point" running along the groove. Accordingly, the groove and / or the area of ​​the closure flap (immediately) adjacent to the groove can be designed as a pivot axis and / or hinge. The groove can preferably be spaced apart from the connecting section, which advantageously prevents the at least one reinforcing rib from flexing or collapsing directly at the connecting section and / or the leading edge, thus avoiding influencing and / or disrupting the opening and / or closing process (through unwanted support). For example, the groove can have a round, particularly semi-circular, cross-section.In other words, the groove can be formed as a round groove in the surface of the closure flap.

[0063] The closure flap may be designed to have at least one, at least two, at least three, at least four, at least five, or a plurality of grooves. These may be arranged in parallel. This may be combined with ribs (see below). Alternatively, no ribs may be provided. For example, the closure flap may be made thicker, combined with at least two (or more) grooves to allow the closure flap to be opened and / or closed, in particular by at least partial folding at the groove(s). This may facilitate manufacturing and / or provide easier cleaning.

[0064] Alternatively or additionally, the locking flap can have a domed shape and / or be designed as such, which may be configured to improve opening and / or closing. This can achieve an (alternative and / or additional) improvement in sealing, opening, and / or closing. The locking flap and / or the domed shape can be designed and / or function similarly to a snap-action mechanism.

[0065] Within the scope of the invention, it may be provided that the closure flap has a leading edge, in particular in a lower section of the closure flap, wherein the leading edge is designed to support the closure flap against the retaining plate, in particular against a nozzle of the retaining plate.

[0066] The leading edge can be essentially parallel to the groove. The leading edge can be rib-like and / or like a (transverse) rib, for example, essentially cuboid in shape, particularly on the (surface of the) closure flap. Advantageously, the leading edge can support the closure flap against the retaining plate, preferably against the nozzle. It can be provided that the lower section of the closure flap, especially the section below the groove, is not or hardly pivotable (in the suction direction), particularly since the leading edge supports the closure flap, and especially this (very lowest) part. Preferably, the leading edge can have a chamfered side to advantageously increase stability. The chamfered side can face the groove. Preferably, the chamfered side can transition directly into the groove.This can preferably increase stability and / or (simultaneously) enable particularly reliable pivoting of the locking flap through or at the level of the groove. Preferably, the locking flap, in particular the locking flap, can be reinforced at the level of and / or along the leading edge, in particular having a greater thickness. This can advantageously (additionally) increase stability and / or robustness.

[0067] It is also conceivable that the locking flap has at least one reinforcing rib, particularly in a lower section of the locking flap.

[0068] Within the scope of the invention, a rib, in particular a leading edge, reinforcing rib(s), transverse rib(s), longitudinal rib(s), and / or inclined rib(s), can be (essentially) cuboid or trapezoidal in shape (with a height and / or width decreasing towards the outside) and / or arranged on the (surface of the) closure flap. This can enable a material-bonded, particularly simple and / or cost-effective manufacturing process. Alternatively or additionally, a rib, in particular a reinforcing rib, transverse rib, longitudinal rib, and / or inclined rib, can (essentially) be designed as or like a bead. It can also be provided that these are designed to have a decreasing width, height, and / or stiffness towards a (closing) edge of the closure flap.

[0069] The reinforcing rib(s), transverse rib(s), longitudinal rib(s), and / or inclined rib(s) are particularly preferably configured to provide a high closing force for the flap in the closed position and / or a low closing force in the open position (see the following descriptions). A straight rib can provide a high closing force and / or a curved rib a low closing force. A wider, taller, and / or longer rib can provide a higher closing force, especially than a narrower, shorter, and / or shorter rib.

[0070] It is particularly preferred if the at least one reinforcing rib is configured to increase the stiffness of the closure flap, especially along one direction of extension of the at least one reinforcing rib. Increased thickness and stiffness of the closure flap and / or the closing edge can (in principle) lead to a lower tendency to flutter, which advantageously prevents and / or reduces (undesired) noise generation, especially at high frequencies (e.g., in the range between 1 kHz and 20 kHz). Furthermore, this can lead to improved sealing, especially since no (or with a lower probability) distortion and / or misclosure occurs. It is particularly preferred that the at least one reinforcing rib bridges and / or (perpendicularly) crosses the groove.This allows at least one reinforcing rib to collapse, deform (at that point), bend, and / or provide a restoring force when the locking flap pivots. A stiffer reinforcing rib can exhibit a higher restoring force and, in particular, enable faster opening and / or closing. Therefore, the at least one reinforcing rib can be designed and / or act like a spring. This preferably eliminates the need for additional and / or other restoring elements (e.g., springs). This can improve manufacturing, costs, environmental friendliness, robustness, and / or recyclability.Preferably, the at least one reinforcing rib can be connected to the closure flap on both sides of the groove, in particular above and below the groove, preferably by a material bond, but preferably not at the level of the groove (advantageously facilitating pivoting) or at the level of the groove (advantageously simplifying manufacturing, increasing stability and / or robustness).

[0071] The stiffness of the closure flap can be designed depending on the position, number, length, width, height and / or stiffness of a rib, in particular a leading edge, groove, reinforcing rib(s), transverse rib(s), longitudinal rib(s), and / or inclined rib(s), and can be developed in a particularly application-specific manner.

[0072] The at least one reinforcing rib can be arranged in the lower, middle, and / or upper section. Preferably, the at least one reinforcing rib can extend from the lower section to the middle and / or upper section. The at least one reinforcing rib can run substantially perpendicular to the suction direction and / or from bottom to top. Arranging the at least one reinforcing rib over the lower, middle, and / or upper section can advantageously provide particularly high stability, robustness, and / or stiffness (in the relevant section) of the closure flap. The at least one reinforcing rib can extend over the entire height or dimension of the closure flap or only partially. The closure flap, particularly extending upwards from the groove, can be designed as a whole to be rigid and / or stiffened, and in particular, pivotable.Alternatively, at least one, at least two, and / or at least three reinforcing ribs may be provided in the lower, middle, and / or upper section, but preferably not in the upper, middle, and / or lower section. Advantageously, the section in which at least one reinforcing rib is arranged may be stiffer than a section in which no (or fewer) reinforcing ribs are arranged. Alternatively, at least one, at least two, and / or at least three reinforcing ribs may be provided in the lower and / or middle section, but preferably not in the upper section. This may advantageously allow the upper section to be more elastic and / or less rigid. This may advantageously enable improved opening, closing, and / or sealing.The upper section, in particular the closing edge of the flap (in the upper section), which opens first and closes last, can be designed to be (comparatively) elastic. This allows the material to pass through more easily, even when the flap is already (partially) closing. This prevents jamming, removal, falling out, and / or spillage of the material. Alternatively or additionally, this can advantageously result in any jammed material being flushly enclosed by the closing edge (in this upper section), preferably forming a seal around the jammed material, which advantageously improves the overall seal.

[0073] The at least one reinforcing rib can be positioned substantially centrally, particularly in the transverse direction and / or from left to right. For example, the reinforcing rib(s), preferably evenly distributed, can be located in the middle quarter, middle third, middle half, middle two-thirds, and / or middle 80% of the closure flap. A (relatively) central arrangement increases stiffness in the middle and / or allows for particularly high elasticity (and improved sealing) at the closing edge. A (relatively) distributed and / or external (left or right) arrangement increases stiffness over a larger area, in the edge region, and / or on the left or right. This allows the width of the elastic closing edge to be determined and / or "adjusted."

[0074] At least two or at least three parallel reinforcing ribs can be formed. Advantageously, this can lead to reduced material usage while maintaining good stability and / or stiffness. At least two or at least three converging reinforcing ribs can also be formed. Advantageously, this can lead to reduced material usage while maintaining good stability and / or stiffness. This allows the reinforcing ribs, particularly in an upper section of the closure flap, to be positioned further away from the (lateral) closing edge. This can improve closing, opening, and / or sealing. It is particularly preferred to arrange (exactly) three reinforcing ribs on the closure flap. A central reinforcing rib can run from top to bottom.Furthermore, a left and a right reinforcing rib can be angled, especially in the direction of the middle reinforcing rib, and especially converge towards it.

[0075] It is particularly preferred if the at least one reinforcing rib has and / or provides a higher stiffness than the other ribs, in particular the transverse rib(s), longitudinal rib(s), and / or diagonal rib(s). Preferably, the transverse rib(s), longitudinal rib(s), and / or diagonal rib(s) have and / or provide (essentially) identical stiffness, for example, by having a comparable and / or identical length, width, and / or height.

[0076] It may be provided that at least one reinforcing rib is taller, wider, and / or has multiple ribs, particularly compared to the other ribs. This can increase the closing force and / or closing speed, and advantageously prevent the flap from remaining (partially) open due to jammed material. The at least one reinforcing rib can be (empirically) optimized, for example, its width (rib thickness) and / or height (rib height). This optimization can include a large opening angle during suction (especially low risk of material jamming and / or high volume flow) and / or rapid closing after the vacuum cleaner is switched off (especially low risk of spillage) and / or dimensional stability at high storage temperatures. For example: For thermoplastic elastomer with a hardness of 59 Shore A: rib height 2.6 mm / rib thickness 1.0 mm at the base to 0.81 mm at the top edge; for thermoplastic elastomer with a hardness of 50 Shore A: rib height 3.0 mm / rib thickness 1.0 mm at the base to 0.78 mm at the top edge; for thermoset elastomer with a hardness of 55 Shore A: rib height 2.78 mm / rib thickness 0.84 mm

[0077] It may be possible to arrange the ribs, especially the reinforcing ribs, as far away as possible from the (closing) edge. This can prevent the closure flap from being completely or widely open, and in particular allows it to conform to and / or around the material being absorbed.

[0078] The remaining ribs (especially not the reinforcing ribs) can be optimized. For example, at least one of the following features can be incorporated: Rib height 3.0 mm / Rib thickness 1.38 mm at the base ... 1.2 mm at the top edge. Flap thickness: 1.0 mm / 0.25 mm (e.g., groove), especially in the area around the groove. Flap material: Best opening and closing behavior after switching off the suction device with thermosets, EPDM, and / or NBR rubber. EPDM with a hardness of 50 Shore A, tensile strength 5.5 MPa. Best manufacturability with thermoplastics, e.g., as a 2K injection mold with a hard component in the retaining plate. (In empirical tests) determined to be the most suitable material with regard to opening and closing behavior and manufacturability: TPE with a hardness of 59 Shore A, tensile strength 8.5 MPa, compression set as low as possible (especially <= 24% (70°C 24h)) and / or alternatively or additionally TPE with a hardness of 50 Shore A, tensile strength 6 MPa, compression set as low as possible (especially <= 21% (70°C 24h)).

[0079] It is also conceivable that the closure flap has (at least) one transverse rib, particularly in a central section of the closure flap, with the transverse rib preferably being interrupted in the middle.

[0080] It is particularly advantageous if the at least one transverse rib is configured to increase the stiffness of the closure flap, especially along one direction of extension of the at least one transverse rib. It is particularly advantageous if the at least one transverse rib is preferably formed parallel to the groove and / or leading edge. This allows the at least one transverse rib to increase stiffness perpendicular to a suction direction and / or from left to right. The interruption, preferably in the center, can increase elasticity and / or reduce stiffness (at that point). This can advantageously lead to improved sealing at the closing edge, especially on the left and / or right.

[0081] The at least one transverse rib can be arranged in the lower, middle, and / or upper section. Preferably, the at least one transverse rib can be formed in the middle section, which advantageously improves the overall stability. The at least one transverse rib can be formed essentially perpendicular to the suction direction and / or from left to right. Arranging the at least one transverse rib over the entire lower, middle, and / or upper section can advantageously provide particularly high stability, robustness, and / or stiffness (in the relevant section) of the closure flap. The at least one transverse rib can extend over the entire width or dimension of the closure flap or only partially. The closure flap, particularly parallel to the groove, can be designed as a whole to be rigid and / or stiffened, and in particular, pivotable.Alternatively, at least one, at least two, and / or at least three transverse ribs may be provided in the lower, middle, and / or upper section, but preferably not in the upper, middle, and / or lower section. Advantageously, the section in which at least one transverse rib is arranged may be stiffer than a section in which no (or fewer) transverse ribs are arranged. Alternatively, at least one, at least two, and / or at least three transverse ribs may be provided in the middle and / or upper section, but preferably not in the upper and / or lower section, where the leading edge is already located (and preferably provides stability and / or stiffness). This allows the lower section to be advantageously more elastic or less rigid, thus saving material.This can advantageously enable improved opening, closing, and / or sealing. The upper section, in particular a closing edge of the flap (in the upper section), which opens first and closes last, can be designed to be (comparatively) elastic. This allows the material to pass through more easily, even when the flap is already (partially) closing. This prevents jamming, removal, falling out, and / or spillage of the material. Alternatively or additionally, this can advantageously result in any jammed material being flushly enclosed by the closing edge (in this upper section), preferably forming a seal around the jammed material, which advantageously increases the overall seal.

[0082] The at least one transverse rib can be positioned substantially centrally, particularly in the longitudinal direction (direction of the longitudinal ribs) and / or from top to bottom. For example, the transverse rib(s), preferably evenly distributed, can be located in the middle quarter, middle third, middle half, middle two-thirds, and / or middle 80% of the closure flap. A (relatively) central arrangement increases stiffness in the middle and / or allows for particularly high elasticity (and improved sealing) at the closing edge. A (relatively) distributed and / or external (left or right) arrangement increases stiffness over a larger area, in the edge region, and / or on the left or right. This allows the width of the elastic closing edge to be determined and / or "adjusted."

[0083] At least two or at least three parallel transverse ribs can be formed. Advantageously, this can lead to good or uniform stability and / or stiffness. At least two or at least three converging transverse ribs and / or transverse ribs with converging ends can be formed. Advantageously, this can lead to reduced material usage while simultaneously providing good stability and / or stiffness. This allows the transverse ribs, particularly in a lateral section of the closure flap (left and right) and / or upper section, to be spaced further away from the (corresponding adjacent) closing edge. This can improve closing, opening, and / or sealing. It is particularly preferred to arrange (exactly) three transverse ribs on the closure flap. A central transverse rib can run from left to right.Furthermore, a left and a right transverse rib can be angled, especially in the direction of the middle transverse rib, and especially converge towards it.

[0084] Within the scope of the invention, it is optionally possible that the closure flap, in particular in an upper section of the closure flap, has a longitudinal rib and / or at least one oblique rib, in particular a left oblique rib, and / or a right oblique rib.

[0085] It is particularly preferred if the (at least one) longitudinal rib and / or at least one oblique rib is designed to increase the stiffness of the closure flap, especially along a (respective) direction of extension. It is particularly preferred that the at least one longitudinal rib is preferably formed parallel and / or aligned with the at least one reinforcing rib. This allows the at least one longitudinal rib to increase stiffness perpendicular to a suction direction and / or from top to bottom. Due to the preferably lower stiffness of the longitudinal rib (compared to the at least one reinforcing rib), elasticity can be increased and / or stiffness (at this point) reduced. This can advantageously lead to improved sealing at the closing edge, especially on the left and / or right.The at least one oblique rib, the at least one transverse rib, the at least one reinforcing rib, and / or the longitudinal rib can preferably be arranged radially, spoke-like, concentrically, and / or star-shaped (similar to sunbeams) radiating from a central point and / or center of the closure flap. Preferably, their orientation can be determined based on the shape of the closure flap, which is particularly planar. This allows the stiffness (and / or flexibility) of the closure flap to be as uniform as possible and / or to decrease (and / or increase) towards the (closing) edge. This advantageously improves the fit of the closure flap, especially the closing edge. It can be provided that a left and / or right oblique rib is substantially angled, particularly relative to the groove, the leading edge, the at least one reinforcing rib, the transverse rib, and / or the longitudinal rib.The angle can be, for example, between 10° and 80°, for example between 20° and 70°, especially between 30° and 60°, preferably between 40° and 50°, ideally (essentially) 45°.

[0086] The (at least one) longitudinal rib and / or at least one diagonal rib can be arranged in the lower, middle, and / or upper section. Preferably, the (at least one) longitudinal rib and / or at least one diagonal rib can be formed in the middle section, which advantageously improves the (overall) stability the most. An arrangement of the (at least one) longitudinal rib and / or at least one diagonal rib over the (entire) lower, middle, and / or upper section can advantageously enable particularly high stability, robustness, and / or stiffness (in the relevant section) of the closure flap. The (at least one) longitudinal rib and / or at least one diagonal rib can extend over the entire width or dimension of the closure flap or, preferably, only partially.The closure flap, particularly parallel and / or perpendicular to the groove, can be designed as a whole to be rigid and / or stiffened, and in particular, pivotable. Alternatively, it can also be provided that the (at least one) longitudinal rib and / or at least one diagonal rib are designed in the lower, middle, and / or upper section, but preferably not in the upper, middle, and / or lower section. Advantageously, the section in which the (at least one) longitudinal rib and / or at least one diagonal rib is arranged can be stiffer than a section in which no (or fewer) longitudinal and / or diagonal ribs are arranged. Alternatively, it can also be provided that the (at least one) longitudinal rib and / or at least one diagonal rib are designed in the middle and / or upper section, but preferably not in the lower and / or middle section.This allows the middle and / or upper section to advantageously have higher stiffness, and in particular to be designed to be more elastic or less rigid than the lower section, in which preferably at least one (stiffer) reinforcing rib is formed. This can advantageously enable improved opening, closing, and / or sealing. The upper section, in particular a closing edge of the flap (in the upper section), which opens first and closes last, can be designed to be (comparatively) elastic. This allows the material to pass through more easily, even when the flap is already (partially) closing. This prevents jamming, removal, falling out, and / or spillage of the material.Alternatively or additionally, this can advantageously lead to (any) jammed suction material being flushly enclosed by the closing edge (in this upper section), preferably forming a seal around the jammed suction material, which advantageously increases the sealing (overall).

[0087] The at least one longitudinal rib can be arranged, in particular parallel to the groove, leading edge, transverse rib (transverse direction), and / or from top to bottom, essentially centrally. For example, the at least one longitudinal rib(s), preferably evenly distributed, can be arranged in the middle quarter, middle third, middle half, middle two-thirds, and / or middle 80% of the closure flap. A (comparatively) central arrangement increases stiffness in the middle and / or enables particularly high elasticity (and improved sealing) at the closing edge. A (comparatively) distributed and / or external (left or right) arrangement increases stiffness over a larger area, in the edge region, and / or on the left or right. This allows the width of the elastic closing edge to be determined and / or "adjusted." It can be provided that a longitudinal rib is aligned with a reinforcing rib.In particular, a longitudinal rib can originate from a reinforcing rib or vice versa.

[0088] Furthermore, it may be provided within the scope of the invention that the closure flap has a connecting section, in particular in a lower section of the closure flap, wherein the connecting section is designed to attach the closure flap to a retaining plate of a filter bag, in particular to a nozzle of the retaining plate.

[0089] The connecting section can be configured to pivot and / or rotate the closure flap. It can also be configured to attach and / or secure the closure flap to the spigot and / or collar, particularly in a permanently detachable manner, preferably by a material bond. This can advantageously enable simple, robust, and / or cost-effective manufacturing, for example, by injection molding, compression molding, and / or vulcanization. The connecting section can have a leading edge (or vice versa) and / or be located adjacent to it. Preferably, the connecting section can be arranged along the edge of the closure flap, preferably in sections.Preferably, the length of the connecting section is short compared to the edge of the closure flap, in particular between 0.1% and 50%, for example between 1% and 40%, preferably between 3% and 30%, most preferably between 4% and 20%, ideally between 8% and 15%. A greater length can provide greater robustness and / or durability. A shorter length can allow for easier opening and / or closing. The remaining length of the closure flap can have a sealing rim, which preferably seals the closure flap against the nozzle (as effectively as possible). Increased elasticity of the sealing rim allows it to conform to (jammed) material. This improves the seal (despite jammed material) and, in particular, prevents unwanted removal of material or spillage (e.g., of dirt particles) from the filter bag.Alternatively or additionally, this can enable "vacuuming", especially through a higher suction level, whereby jammed material can be removed from the elastic closing edge.

[0090] The above problem is solved according to a third aspect by a vacuum cleaner according to the invention having a vacuum cleaner-side holding nozzle which is designed to enable the arrangement of a filter bag, in particular according to the first aspect, on the vacuum cleaner-side holding nozzle.

[0091] The vacuum cleaner can accommodate the filter unit, which can be arranged on or inside the vacuum cleaner. The vacuum cleaner can have a suction fan, which can be driven, for example, by an electric motor. The vacuum cleaner can have a battery, particularly a rechargeable battery, as an energy source for driving the electric motor and can be designed to be cordless. Alternatively or additionally, the vacuum cleaner can be connected to a mains power supply. Preferably, the vacuum cleaner's mounting bracket is designed to attach the mounting plate and / or the nozzle, preferably in a reversibly detachable manner. The vacuum cleaner can have a filter bag detection unit, which preferably interacts with a filter bag detection element in the filter bag.The filter bag detection element can be configured to be sensorily detected by the filter bag detection unit, for example optically, inductively, and / or capacitively. For instance, the filter bag detection element can be designed as an (electrically conductive) coil into which the filter bag detection unit can induce a current and / or measure a resulting magnetic field.

[0092] This results in the same advantages with regard to a vacuum cleaner according to the third aspect of the invention as have already been described with regard to a filter bag according to the first aspect of the invention and / or a closure flap according to the second aspect of the invention.

[0093] Within the scope of the invention, it is optionally possible that the vacuum cleaner-side retaining nozzle for arranging a filter bag has a reversibly detachable fastening device, in particular a rail, a thread, and / or a click connection.

[0094] The above problem is solved according to a fourth aspect by a system according to the invention comprising a vacuum cleaner, preferably according to the third aspect, with a vacuum cleaner-side holding nozzle and a filter bag, preferably according to the first aspect, wherein the filter bag has a filter material for receiving suctioned material and a holding plate for arranging it on the vacuum cleaner-side holding nozzle.

[0095] The vacuum cleaner and the filter bag can work synergistically together (see above). In particular, the vacuum cleaner's blower can draw in debris that can be collected in the filter bag. The sealing flap creates a seal, ideally preventing any debris from escaping the filter bag.

[0096] This results in the same advantages with regard to a system according to the fourth aspect as have already been described with regard to a filter bag according to the first aspect and / or a closure flap according to the second aspect and / or a vacuum cleaner according to the third aspect.

[0097] Further advantages, features, and details of the invention will become apparent from the following description, in which several exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination. Fig. 1 a filter bag Fig. 2 a filter bag Fig. 3 a nozzle with closure flap Fig. 4 a closure flap Fig. 5 an open closure flap with (collapsed) reinforcing ribs Fig. 6 an open closure flap in side view Fig. 7 a closure flap without ribs in the upper section Fig. 8 a closure flap with (star-shaped) ribs in the upper section Fig. 9 a filter bag with filter material Fig. 10 a nozzle Fig. 11 a nozzle Fig. 12 a nozzle, and Fig. 13 a closure flap which is jammed by suction material.

[0098] In the following figures, identical reference numerals are used for the same technical features, even for different embodiments.

[0099] Figure 1Figure 1 shows a filter bag 100. A retaining plate 20 is shown, on which a nozzle 21 is arranged. By way of example, the retaining plate 20 has a mating nozzle on which the nozzle 21 can be arranged. The retaining plate 20 also has a handle 23, which is pivotably arranged on the retaining plate 20 via a film hinge 23.1. The nozzle 21 has a longitudinal axis 21.1 along which the nozzle 21 extends (essentially). The nozzle 21 has a collar 24 on which a filter material 10 can be arranged. The nozzle 21 preferably has a closing flap 30, which can be pivotably mounted on the nozzle 21. In this example, the closing flap 30 comprises a longitudinal rib 33.1, which is partially visible in the illustration. In addition, the closure flap 30 includes a transverse rib 32.1 and / or a reinforcing rib 32.1.

[0100] Figure 2 shows a filter bag 100, especially in reference to Figure 1A mounting plate 20 is shown, on which a nozzle 21 is arranged. The mounting plate 20 also has a handle 23, which is pivotably mounted on the mounting plate 20 via a film hinge 23.1. The nozzle 21 has a longitudinal axis 21.1 along which the nozzle 21 extends (essentially). In this case, an angle 21.2 is formed essentially perpendicularly. However, other configurations are conceivable (see above and / or Figures 10, 11, 12 The nozzle 21 has a collar 24 on which a filter material 10 can be arranged. The nozzle 21 preferably has a closing flap 30, which can be pivotably mounted on the nozzle 21. The closing flap 30 comprises a longitudinal rib 33.1, which is shown in section in the illustration.

[0101] Figure 3Figure 1 shows a closure flap 30, which can be pivotally mounted on the nozzle 21. The closure flap 30 includes, in this case, an (example L-shaped) connecting section 31.6, via which, in particular, the closure flap 30 can be connected to the nozzle 21, for example, by a material bond, adhesive bond, and / or welding. Furthermore, the closure flap 30 can have a leading edge 31.5, which in this case is directly connected to and / or transitions into a groove 31.1. The groove 31.1 can form a defined bend along which the closure flap 30 (in this case in Figure 3The (not shown here) at least one reinforcing rib 31.2, 31.3, 31.4 can generate a restoring force and / or closing force that preferably closes the closure flap 30 and / or keeps it (sealed) closed. The closure flap 30 can have a lower section 31, a middle section 32, and / or an upper section 33. A groove 31.1, a leading edge 31.5, and / or a connecting section 31.6 can be arranged in the lower section 31. A transverse rib 32.1 can be arranged in the middle section 32, which can particularly increase the stiffness of the closure flap 30 (along this direction). In the upper section 33, an inclined rib 33.2, 33.3, in particular a right inclined rib 33.3, can be arranged, which can in particular increase the stiffness of the closing flap 30 (along this direction).

[0102] Figure 4Figure 1 shows a closure flap 30, which can be pivotally mounted on the nozzle 21. A collar 24 of the nozzle 21 is also shown. The closure flap 30 includes a leading edge 31.5, which is directly connected to and / or transitions into a groove 31.1. The groove 31.1 can form a defined bend along which the closure flap 30 (in this case in Figure 4The closure flap 30 can be opened (out of the plane of the image). The at least one reinforcing rib 31.2, 31.3, 31.4 can generate a restoring force and / or closing force that preferably closes the closure flap 30 and / or keeps it (sealed) closed. The closure flap 30 can have a lower section 31, a middle section 32, and / or an upper section 33. A groove 31.1, a leading edge 31.5, and / or a connecting section 31.6 can be arranged in the lower section 31. A transverse rib 32.1 can be arranged in the middle section 32, which can particularly increase the stiffness of the closure flap 30 (along this direction). In the upper section 33, a diagonal rib 33.2, 33.3, in particular a left diagonal rib 33.2 and / or a right diagonal rib 33.3, can be arranged, as well as optionally a longitudinal rib 33.1, which in particular (each) can increase the stiffness of the closure flap 30 (along this direction). The directions "top", "bottom", "left" and / or "right" can be used as examples for orientation or illustration. For instance, at least one reinforcing rib 31.2, 31.3, 31.4 extends from bottom to top.

[0103] Figure 5 shows, especially in reference to Figure 4A closure flap 30, which has at least one reinforcing rib 31.2, 31.3, 31.4. By way of example, the at least one reinforcing rib 31.2, 31.3, 31.4 (each) is collapsed, kinked and / or bent, in particular along and / or due to an underlying groove 31.1, preferably when opening and / or in the open state of the closure flap 30. Due to the deformation, the at least one reinforcing rib 31.2, 31.3, 31.4 can provide a restoring force which can preferably close the closure flap 30 (quickly), in particular when the vacuum cleaner 200 is switched off.

[0104] Figure 6 shows, especially in reference to Figure 5A closure flap 30, which is at least partially open, is shown in a side view. The closure flap 30 can be made of an elastic material and / or be manufactured in one piece (as an injection-molded part, preferably made of plastic). Accordingly, the closure flap 30 can be designed to bend (reversibly), in particular to enable and / or reinforce opening.

[0105] Figure 7 Figure 1 shows a closure flap 30. The closure flap 30 includes a connection section 31.6, via which the closure flap 30 can be connected to the nozzle 21, for example, by a material bond, adhesive bond, and / or welding. Furthermore, the closure flap 30 can have a leading edge 31.5, which in this case is directly connected to and / or transitions into a groove 31.1. The groove 31.1 can form a defined bend along which the closure flap 30 (in this case in Figure 7The closure flap 30 can be opened (out of the plane of the image). The at least one reinforcing rib 31.2, 31.3, 31.4 can generate a restoring force and / or closing force that preferably closes the closure flap 30 and / or keeps it (sealed) closed. The closure flap 30 can have a lower section 31, a middle section 32, and / or an upper section 33. A groove 31.1, a leading edge 31.5, and / or a connecting section 31.6 can be arranged in the lower section 31. A transverse rib 32.1 can be arranged in the middle section 32 and / or upper section 33, which can particularly increase the stiffness of the closure flap 30 (along this direction). No rib can be provided in the upper section 33. This advantageously increases the flexibility and / or reduces the stiffness in this section.This can optimize sealing, conforming (to potentially jammed suction material), closing, opening and / or freeing the suction.

[0106] Figure 8 Figure 1 shows a closure flap 30. The closure flap 30 comprises a connection section 31.6, via which the closure flap 30 can be connected to a nozzle 21, for example, by a material bond, adhesive bond, and / or welding. Furthermore, the closure flap 30 can have a leading edge 31.5, which in this case is directly connected to and / or transitions into a groove 31.1. The groove 31.1 can form a defined bend along which the closure flap 30 (in this case in Figure 8The closure flap 30 can be opened (out of the plane of the image). The at least one reinforcing rib 31.2, 31.3, 31.4 can generate a restoring force and / or closing force that preferably closes the closure flap 30 and / or keeps it (sealed) closed. The closure flap 30 can have a lower section 31, a middle section 32, and / or an upper section 33. A groove 31.1, a leading edge 31.5, and / or a connecting section 31.6 can be arranged in the lower section 31. A transverse rib 32.1 can be arranged in the middle section 32, which can particularly increase the stiffness of the closure flap 30 (along this direction). In this case, the transverse rib 32.1 is interrupted (in the middle). This can increase the flexibility (compared to a continuous transverse rib). In the upper section 33, a slant rib 33.2, 33.3, in particular a left slant rib 33.2 and / or a right slant rib 33.2 can be provided.3, arranged, and optionally a longitudinal rib 33.1, which can in particular (each) increase the stiffness of the closure flap 30 (along this direction). The ribs 32.1, 33.1, 33.2, 33.3 in the middle section 32 and / or upper section 33 can be "weaker", narrower (less width), or shorter (less height from the plane of the image), especially compared to the "reinforced" reinforcing ribs 31.2, 31.3, 31.4. This can optimize sealing, conformity (to potentially jammed material), closing, opening, and / or freeing. Alternatively or additionally, the ribs 32.1, 33.1, 33.2, 33.3 in the middle section 32 and / or upper section 33 can be arranged radially and / or in a star shape. This allows for a particularly good compromise between stiffness, especially in the center of the closure flap 30, and / or flexibility, especially at or near an outer (closing) edge of the closure flap 30.

[0107] Figure 9Figure 1 shows a filter bag 100 comprising a retaining plate 20 with a handle 23 (for pulling the filter bag 100 out of a vacuum cleaner-side retaining nozzle). A filter material 10 of the filter bag 100 can be arranged on the retaining plate 20 and / or (preferably) on a nozzle 21 (not shown), for example, by gluing and / or welding. A filter ring 10.1 of the filter bag 100 can optimize its arrangement, in particular its fastening, for example, with a fastener. The filter ring 10.1 can be connected to the filter material 10. The filter ring 10.1 can then be arranged on the nozzle 21 (see above). The filter material 10 can define or enclose an interior space 11. This space can hold a material 1, which has preferably been vacuumed up by a vacuum cleaner containing the filter bag 100.In particular, when operating the vacuum cleaner, a suction direction 2 can be formed and / or defined, along which air and / or vacuumed material can (essentially) be transported.

[0108] Figure 10 shows a 21-inch barrel with an elliptical shape.

[0109] Figure 11 Figure 1 shows a nozzle 21 with a hyperbolic-paraboloidal shape. Preferably, the nozzle can have an undercut 22 and / or a groove. A filter material can be arranged on, around, and / or around the undercut 22.

[0110] Figure 12Figure 21 shows a nozzle 21 with a curved shape. The nozzle 21 can therefore be designed as an angled tube. Preferably, the nozzle can have an undercut 22 and / or a groove. A filter material can be arranged on, around, and / or around the undercut 22. In particular, the nozzle 21 can be designed to be non-cylindrical (see Figure 2). Figures 10, 11, 12 ).

[0111] Figure 13 shows a nozzle 21 which has a (at least partially) open closure flap 30. However, the closure flap 30 can be obstructed by absorbent material 1, for example cat litter (as in Figure 13), become jammed. This can be prevented according to the invention. For example, the flexibility of the closure flap 30 can be increased, preferably in a (closing) edge area, and / or its stiffness reduced. This can allow it to conform to the jammed material 1. Alternatively or additionally, jamming can be prevented (from the outset), in particular by closing the closure flap 30 more quickly. The jammed material 1 can also be freed by suction. Reference symbol list

[0112] 1. Material to be suctioned 2. Suction direction 10. Filter material 10.1. Filter ring 11. Interior 20. Retaining plate 21. Nozzle 21.1. Longitudinal axis 21.2. Angle 22. Undercut 23. Handle part 23.1. Film hinge 24. Collar 30. Closure flap 31. Lower section 31.1. Groove 31.2. Reinforcing rib 31.3. Reinforcing rib 31.4. Reinforcing rib 31.5. Leading edge 31.6. Connection section 32. Middle section 32.1. Transverse rib 33. Upper section 33.1. Longitudinal rib 33.2. (Left) diagonal rib 33.3. (Right) diagonal rib 40. Seal 100. Filter bag 200. Vacuum cleaner 220. Retaining nozzle

Claims

1. Filter bag (100), in particular for a vacuum cleaner (200), comprising a filter material (10) for receiving suction material (1) and a retaining plate (20) for arranging on a vacuum cleaner-side retaining nozzle (220).

2. Filter bag (100) according to claim 1, characterized by thatthe retaining plate (20) has a nozzle (21) on which the filter material (10) is arranged, wherein preferably the nozzle (21) has a non-cylindrical shape, and / or that the retaining plate (20) has a nozzle (21) on which the filter material (10) is attached by a fastening means, in particular an adhesive bond and / or a welded bond, and / or that the retaining plate (20) has a nozzle (21) wherein the nozzle (21), in particular a longitudinal axis (21.1) of the nozzle (21), is angled relative to the retaining plate (20), wherein in particular an angle (21.2) between the retaining plate (20) and the nozzle (21), in particular between the retaining plate (20) and a longitudinal axis (21.1) of the nozzle (21), is acute or obtuse.

3. Filter bag (100) according to one of the preceding claims, characterized by thatthe retaining plate (20) has a nozzle (21), wherein the nozzle (21) has at least a section of an undercut (22) to preferably enable improved attachment of the filter material (10) to the nozzle (21), and / or that the retaining plate (20) has a nozzle (21), wherein the retaining plate (20) and / or the nozzle (21) has at least a section of a counter rail, a counter thread, and / or a counter click connection, which can be arranged in particular on a rail, a thread, and / or a click connection of a vacuum cleaner-side retaining nozzle (220).

4. Filter bag (100) according to one of the preceding claims, characterized by thatthe filter bag (100) has a seal (40), wherein the seal (40) is arranged between the filter material (10) and the retaining plate (20), in particular between the filter material (10) and a nozzle (21) of the retaining plate (20), and / or that the filter bag (100) has a closing flap (30) which is arranged on the retaining plate (20), or in particular on a nozzle (21) of the filter bag (100), wherein preferably the closing flap (30) is designed to prevent the removal of suction material (1) from the filter bag (100).

5. Closure flap (30) for a filter bag (100), in particular for a vacuum cleaner (200), wherein the closure flap (30) is designed to open or close the filter bag (100).

6. Closure flap (30) according to one of the preceding claims, characterized by thatthe closure flap (30) is designed to be movable, in particular pivotable, relative to the filter bag (100), in particular to a filter material (10), a retaining plate (20) and / or a nozzle (21) of the filter bag (100).

7. Closure flap (30) according to one of the preceding claims, characterized by that the closure flap (30) is designed to open into an interior (11) of the filter bag (100), and / or that the closure flap (30), in particular in sections, has an elastic material, and / or that the closure flap (30) is designed in one piece, in particular of a single material, and in particular has a one-piece and / or integrated closure mechanism.

8. Closure flap (30) according to one of the preceding claims, characterized by thatthe closure flap (30) has a groove (31.1), in particular in a lower section (31) of the closure flap (30), wherein the groove (31.1) is configured to facilitate opening and / or closing the closure flap (30), in particular relative to the retaining plate (20), and / or that the closure flap (30) has a leading edge (31.5), in particular in a lower section (31) of the closure flap (30), wherein the leading edge (31.5) is configured to support the closure flap (30) against the retaining plate (20), in particular against a nozzle (21) of the retaining plate (20).

9. Closure flap (30) according to one of the preceding claims, characterized by thatthe closure flap (30) has at least one reinforcing rib (31.2, 31.3, 31.4), in particular in a lower section (31) of the closure flap (30), and / or that the closure flap (30) has a transverse rib (32.1), in particular in a middle section (32) of the closure flap (30), wherein preferably the transverse rib (32.1) is interrupted in the middle.

10. Closure flap (30) according to one of the preceding claims, characterized by that the closing flap (30), in particular in an upper section (33) of the closing flap (30), has a longitudinal rib (33.1) and / or at least one oblique rib (33.2, 33.3), in particular a left oblique rib (33.2), and / or a right oblique rib (33.3).

11. Closure flap (30) according to one of the preceding claims, characterized by thatthe closure flap (30) has a connecting section (31.6), in particular in a lower section (31) of the closure flap (30), wherein the connecting section (31.6) is configured to attach the closure flap (30) to a retaining plate (20) of a filter bag (100), in particular to a nozzle (21) of the retaining plate (20).

12. Filter bag (100) according to one of the preceding claims, characterized by that the filter bag (100) has a closure flap (30) according to one of the preceding claims.

13. Vacuum cleaner (200) comprising a vacuum cleaner-side retaining nozzle (220) which is designed to enable the arrangement of a filter bag (100), in particular according to one of the preceding claims, on the vacuum cleaner-side retaining nozzle (220).

14. Vacuum cleaner (200) according to the preceding claim, wherein the vacuum cleaner-side retaining nozzle (220) for arranging a filter bag (100) has a reversibly detachable fastening device, in particular a rail, a thread, and / or a click connection.

15. System comprising a vacuum cleaner (200) with a vacuum cleaner-side holding nozzle (220) and a filter bag (100) according to one of the preceding claims, wherein the filter bag (100) has a filter material (10) for receiving vacuumed material (1) and a holding plate (20) for arranging on the vacuum cleaner-side holding nozzle (220).

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