Device for cutting and creasing cardboard boxes

Abstract

Device for processing cardboard, comprising a hand housing (1) with a linearly guided, extendable cutting blade (2), characterized in that an outwardly projecting groove projection (5) is provided in the front area of ​​the housing (1), which tapers towards the direction of pressure and terminates in a rounded pressure edge (6), so that a folding groove can be produced when the device is pressed and guided along a cardboard surface.

Description

Technical field

[0001] The invention relates to hand tools for processing cardboard and paperboard, in particular a hand-held device with an extendable cutting blade and a creasing projection (creasing “nose”) integrated into the housing for the subsequent production / formation of fold / crease creases in solid board and corrugated board. State of the art

[0002] With the growth of online retail, the need to quickly and cost-effectively adapt cardboard boxes to individual packing heights is increasing, thereby reducing the need for packing material, shipping costs, and disposal fees. Furthermore, appropriate size adjustments allow for greater recycling of used cardboard boxes. Cardboard scoring tools (e.g., machines or handheld devices) are well-known for this purpose, but they are often bulky, expensive, and time-consuming to use. If thick cardboard is folded without a prior score or simply cut, it can easily crack at the crease, requiring additional gluing or reinforcement. While standard utility knives have anti-slip features, they lack a specially designed, narrow scoring blade that creates a defined crease under moderate pressure. Task

[0003] The aim is to provide a compact, universally applicable and cost-effective handheld device that enables the creasing of cardboard boxes in one operation and also performs the cutting (e.g. of corners or flaps) - without breakage, with improved handling and increased safety. Solution to the task

[0004] The task is solved by a cutter hand device with a housing (1) for a linearly guided, extendable blade (2), wherein an outwardly projecting groove projection (5) is formed in the front area of ​​the housing.

[0005] The scoring projection tapers towards the direction of pressure and ends in a rounded pressure edge (6). When the device is placed on and guided along the cardboard, the local surface pressure creates a uniform groove along which the cardboard can be neatly folded. The blade (2) can be extended independently for cutting cardboard corners or flaps. The area of ​​the "nose" is reinforced with material; a wear-resistant insert is available as an option. Advantages • Ergonomics / Efficiency: The narrow contact point reduces the force required for grooving. Work is faster and more reproducible. • Quality of the fold: The rounded pressure edge forms a defined crush groove, thus preventing breaks when folding. • Robustness: The additional material thickness / reinforcement in the nose area prevents breakage of the plastic housing and secures the blade guidance. • Safety: The nose area also serves as finger protection against slipping into the blade area while cutting. • Compactness / Cost: Cutting and creasing are combined in an inexpensive handheld device; bulky creasing machines are no longer needed. • Universality: Suitable for solid board and multi-layer corrugated board of various thicknesses. Brief description of the drawings Fig. 1: Longitudinal section through an embodiment of the device; on the front side the integrated groove projection (5) with rounded pressure edge (6), blade guide (10) and sliding carriage (3) with clamping lock (4). Fig. 2 (AB): Cross-section through the front of the device; the upwardly projecting and tapered extension (“nose”) for optional use (5a) is visible. Fig. 3 (CD): Cross-section through the outer contour of the “nose”; oval / elliptical outer shape with rounded tip area as pressure edge (6). Examples of implementation

[0006] In Fig. Figure 1 shows a cutter housing (1) which has a blade guide (10) for an extendable segment blade (2). The blade is guided via a sliding carriage (3) with operating knurled (4) and locked in detent positions.

[0007] On the front housing section, the groove nose (5) is integrally formed with the housing (1) or inserted as a separate component (5a) in a form-fit / force-fit manner (cf. Fig. 2) The nose (5) projects preferably 1-6 mm beyond the adjacent outer surface of the housing and terminates in a rounded contact edge (6) with a radius of preferably 0.3-2.5 mm. The width of the effective contact surface is preferably 1-5 mm, resulting in a groove width of approximately 2-3 mm.

[0008] For low friction and wear, the contact edge (6) can be designed as an insert (5a) made of metal (e.g., stainless steel) or a low-friction polymer (e.g., POM, PTFE-coated). Recesses (8) are preferably provided on the handle side to prevent slipping. Alternatively, appropriate coatings or a roughened surface are also conceivable.

[0009] A locking mechanism (4) prevents the blade from extending unintentionally. Also important is a slip guard on the underside in the form of a slight housing protrusion (9).

[0010] In use, the nose (5) is guided along the desired groove line with moderate pressure, thus creating a groove / fold for folding. The blade (2) is then extended to make the corner cut and, if necessary, the flap cut or section.

[0011] Material and manufacturing options: The housing (1) can be injection molded (ABS, PA6, glass fiber reinforced) or manufactured as a two-component part with a soft sliding zone; the insert (5a) can be clipped, screwed or ultrasonically welded.

[0012] For a particularly durable version, the product can also be made of metal, e.g., zinc die-cast. Reference symbol list 1 case 2 cutting blades 3 sliding carriages 4 blade lock 5 Groove projection (“nose”) 5a wear-resistant insert / attachment / insert in the nose area 6 rounded pressure edge 7 structured surface on feed and locking mechanism 8 Grip structure / slip resistance 9 Anti-slip protection on the underside 10 Blade guide Summary (Abstract)

[0013] The invention relates to a handheld cutter for cutting and creasing cardboard. For this purpose, an outwardly projecting creasing protrusion with a rounded contact edge, tapered towards the direction of pressure, is integrated into the front of the cutter housing. This protrusion creates a defined crease / folding groove when guided along a cardboard surface. The cutting blade can be operated independently. The device works quickly, cost-effectively, and reduces material breakage; optionally, the creasing protrusion is designed as a wear-resistant insert or is available as a retrofit attachment.

Claims

[1] Device for processing cardboard, comprising a hand housing (1) with a linearly guided, extendable cutting blade (2), characterized by , that in the front area of ​​the housing (1) an outwardly projecting groove projection (5) is provided which tapers towards the direction of pressure and terminates in a rounded pressure edge (6) so that a folding groove can be produced when the device is pressed and moved along a cardboard surface. [2] Device according to claim 1, characterized by , that the contact edge (6) preferably has a radius of 0.3-2.5 mm. [3] Device according to one of claims 1-2, characterized by , that the groove projection (5) projects preferably 1-6 mm beyond the adjacent outer surface of the housing. [4] Device according to any of the preceding claims, characterized by , that the effective contact width of the groove projection (5) is preferably 1-5 mm and produces a groove width of e.g. 2-3 mm. [5] Device according to any of the preceding claims, characterized by , that the groove projection (5) is integrally manufactured with the housing (1). [6] Device according to one of claims 1-4, characterized by , that the groove projection (5) is inserted as a replaceable insert (5a) made of a wear-resistant material into a receptacle formed in the housing (1). [7] Device according to claim 6, characterized by , that the insert (5a) is held in a form-fitting manner via an overlapping housing groove or snap connection (see cross-section) Fig. 2). [8] Device according to any of the preceding claims, characterized by that the insert (5a) is made of metal, in particular stainless steel, or is made of or coated with a sliding polymer. [9] Device according to any of the preceding claims, characterized by , that the nose area (5) is designed as a material-reinforced housing section to absorb point loads during grooving. [10] Device according to any one of the preceding claims, characterized by , that the groove nose (5) is arranged above the exit opening of the cutting blade (2), so that the grooving and cutting processes can be carried out independently of each other. [11] Device according to any of the preceding claims, characterized by , that the housing (1) has textured grip surfaces (8) and a locking mechanism or locking button for the blade (2) with a textured surface (7). [12] Grooving attachment for a cutter housing (1), characterized by , that the attachment has a grooved projection (5) with a rounded contact edge (6) according to one of claims 1-4 and can be attached to an existing cutter in a form-fit / force-fit manner for subsequent retrofitting.

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