Device for rolling a sheet

Abstract

One aspect of the invention relates to a sheet rolling device (10) comprising: - a main housing (12) extending between a front face (12) and a rear face (14) and including a cover (18) having a first receiving slot (24), - a sliding element (48) mounted for translational movement within the main housing, from the front face of the housing, and including a shell (50) having a second receiving slot (60), - a rotating element (86) mounted for rotational movement and including a shaft (88) housed inside the main housing, from the rear face of the housing, the shaft having a third open receiving slot (94), and - a stopping surface. In the closed position of the rolling device, the first and second slots are aligned along the same vertical plane P.

Description

DOMAINE TECHNIQUE DE L'INVENTION

[0001] The present invention relates to the field of smoking articles and particularly to rolling cigarettes.

[0002] The present invention relates more particularly to a device for rolling a sheet of paper or cardboard for a roll-your-own cigarette and a method for rolling a sheet. ARRIERE-PLAN TECHNOLOGIQUE DE L'INVENTION

[0003] Traditionally, cigarette filters are made manually by winding a strip of paper or cardboard to form the outer part of the filter, which is cylindrical or conical in shape. The winding of the paper strip may be preceded by a folding step to create a central section with one or more internal partitions. This type of filter offers superior filtration capacity.

[0004] There are devices that allow the filling and rolling of a hand-rolled cigarette, equipped with rollers that allow the paper sheet to be wrapped around the filling.

[0005] We also know from document FR 386590A of a device for rolling a sheet of filter paper using several concentric mandrels of different diameters. However, this is a complex industrial device and not a handheld appliance.

[0006] A pocket-sized device for rolling both a cigarette and its filter is also known from US patent 9943102B1. This device consists of a cylindrical piece extended at one end by two longitudinal arms slightly spaced apart to form a fork. The user begins by rolling the filter paper, placing it between the longitudinal arms, and then rotating the device. Next, a cigarette paper is placed around the cylindrical piece and the rolled filter, which is then wrapped by rotating the device again.

[0007] However, this type of device is not practical for the user, nor is it suitable for rolling a sheet of paper or cardboard to make a filter for rolling cigarettes if one wishes to obtain a rolled paper with improved filtering capacity. RESUME DE L'INVENTION

[0008] The invention offers a solution for rolling a sheet by proposing a rolling device and a method for rolling a sheet of paper or cardboard.

[0009] A first aspect of the invention relates to a device for rolling a sheet of paper or cardboard comprising: a main housing extending along a longitudinal axis X between a front face and a rear face and comprising an outer cover having a first receiving slot, a sliding element mounted movable in translation along the longitudinal axis X in the main housing, from the front face of the main housing, between an open and a closed position of the main housing, the sliding element comprising: ∘ a shell extending along the longitudinal axis X between a front edge and a rear edge and comprising a rounded upper portion having a second receiving slot, and ∘ a closing wall of the front face of the main housing, a rotating element mounted movable in rotation along the longitudinal axis X and comprising: ∘ a cylindrical shaft delimited between a first and a second end and housed inside the main housing, from the rear face of the main housing,the shaft having a third receiving slot open to its second end, and a knurled wheel fixed to the first end of the shaft, a stopping surface. In the closed position of the rolling device: the first and second receiving slots are aligned along the same vertical plane P including the longitudinal axis X, the second receiving slot is arranged between the first receiving slot and the shaft of the rotating element along a vertical axis V, and the rounded upper portion of the shell of the sliding element is arranged opposite the shaft of the rotating element.

[0010] The rolling device according to the invention is a compact, pocket-sized device that produces a sheet of paper or cardboard rolled to a predetermined diameter. Using a rolling device improves the quality of the rolling and standardizes the geometry of the rolled sheets.

[0011] In addition to the characteristics mentioned in the previous paragraph, the rolling device has additional features: The third receiving slot of the rotating element is radially through-through to allow the introduction of a sheet through this slot; it includes a support having the stop surface opposite the first slot against which a sheet previously introduced into the first receiving slot is abutted; it includes a support in which is arranged a retaining groove having the stop surface opposite the shaft of the rotating element, and the retaining groove is aligned with the first and second receiving slots along the same vertical plane P to ensure that a sheet is held in position at the beginning of rolling; the third receiving slot of the rotating element extends only along a portion of the diameter of the shaft of the rotating element and includes the stop surface; according to this alternative to the previous feature, the stop surface is directly integrated into the third receiving slot.The closing wall of the sliding element has a pin cooperating with a blind hole arranged at the second end of the shaft of the rotating element, and the pin and the hole are aligned along the longitudinal axis X to hold the shaft of the rotating element in position and facilitate the rotation of the rotating element; the main housing has at least one first guide rail in translation along the longitudinal axis X cooperating with at least one second guide rail of the sliding element to allow the translation of the sliding element in the main housing between an open position and a closed position of the main housing; at least one of the first and second guide rails has a translational locking stop provided to stop the translation of the sliding element in the main housing in the open position of the main housing.The sliding element's shell includes at least one elastic blade with a free end positioned opposite the rotating element's shaft to hold a sheet against the rotating element's shaft during rolling. The second slot of the sliding element is delimited by two longitudinal sides, and the free end of the elastic blade forms one of the two longitudinal sides of the second receiving slot. The third receiving slot is formed directly by a cutout in the shell, simplifying the geometry of the sliding element's shell. The free end of the elastic blade is at an angular distance D within the range ]0-45[ degrees relative to the vertical plane P. The main housing and the rotating element each have a positioning mark, and when the marks are aligned,The third receiving slot of the rotating element is aligned with the first and second receiving slots along the same vertical plane P; the rear edge of the sliding element's shell includes a shoulder extending radially towards the longitudinal axis X, the internal diameter of which is equal to the diameter of the rotating element's shaft, to pull a rolled sheet around the rotating element's shaft during the sliding element's translation within the main housing towards the open position of the main housing until the sheet exits the rotating element's shaft; and the sliding element's shell has an open lower portion provided for expelling a rolled sheet from the rolling device.

[0012] A second aspect of the invention relates to a method for rolling a sheet of paper or cardboard using a rolling device according to the invention; the rolling method comprises the following steps: alignment of the first, second and third receiving slots of the rolling device along the same vertical plane P, introduction of the sheet into the main housing, through the first, second and third receiving slots of the rolling device until the stop surface, rotation of the wheel of the rotating element in a predetermined direction until the total insertion of the sheet into the rolling device, translation of the sliding element of the device until the main housing of the rolling device is open, and expulsion of the rolled sheet from the rolling device.

[0013] The rolling process according to the invention allows a sheet of paper or cardboard to be rolled individually, that is to say one sheet at a time.

[0014] The invention and its various applications will be better understood by reading the following description and examining the accompanying figures. BREVE DESCRIPTION DES FIGURES

[0015] Other advantages and features of the invention will become apparent from the following description, illustrated by the figures in which: There figure 1 is a perspective view of a rolling device according to the invention comprising a main housing, a sliding element and a rotating element, in the closed position of the main housing; The figure 2 is a perspective view of the main housing of the rolling device according to a first embodiment; The figure 3 is a perspective view of the sliding element of the rolling device; The figure 4 is a perspective view of the rotating element of the rolling device according to a first embodiment; The figure 5 is a partial longitudinal cross-sectional view of the rolling device, in the open position of the main housing, in which a sheet is rolled; The figure 6 is a cross-sectional view of the rolling device of the figure 1 into which a sheet is inserted; The figure 7 is a cross-sectional view of the rolling device of the figure 2 in which a sheet is rolled; The figure 8 is a cross-sectional view of a sheet rolled by the rolling device of the figure 2 ; There figure 9 is a cross-sectional view of the rolling device according to a second embodiment of the invention in which a sheet is introduced; The figure 10 is a cross-sectional view of the rolling device according to a third embodiment of the invention in which a sheet is introduced. DESCRIPTION DETAILLEE

[0016] An example of an embodiment of a rolling device according to the invention is described in detail below, with reference to the accompanying drawings. This example illustrates the features and advantages of the invention.

[0017] Unless otherwise specified, the same element appearing on different figures has a unique reference.

[0018] For the purposes of understanding the invention, the vertical, longitudinal, and transverse orientations will be adopted according to the V, L, T coordinate system shown in the figures, whose longitudinal axis L and transverse axis T extend in a horizontal plane. The rear of the device towards the front of the rolling device is oriented along the longitudinal axis L of the VLT coordinate system.

[0019] There figure 1 illustrates a rolling device 10 for paper or cardboard comprising: a main housing 12 which extends along a longitudinal axis X parallel to the longitudinal axis L of the VLT frame between a front face 14 and a rear face 16, a sliding element 48 mounted movable in translation along the longitudinal axis X in the main housing 12, from the front face 14 of the main housing 12, between an open position and a closed position of the main housing 12, and a rotating element 86 mounted movable in rotation along the longitudinal axis X.

[0020] Advantageously, the sliding element 48 and the rotating element 86 are removable relative to the main housing 12 of the rolling device 10, according to a translational movement along the longitudinal axis X.

[0021] THE figures 2 à 7 represent the rolling device according to a first embodiment, the figure 9 is a representation of the rolling device according to a second embodiment and the figure 10 illustrates the rolling device according to a third embodiment.

[0022] The main housing 12 as shown in isolation at the figure 2 understand : a base 28 delimited transversely by two lateral edges 29, an outer cover 18 comprising a lower portion 20 and a rounded upper portion 22, the lower portion 20 being the portion closest to the base 28 and the upper portion 22 being the portion furthest from the base 28, a first receiving slot 24 arranged in the upper portion 22 of the cover 18, a support 30 for rolling the sheet 106 arranged from the base 28 and having a rounded shape whose convex face is oriented towards the cover 18, two first guide rails 38 translating along the longitudinal axis X, each comprising a front end 40 equipped with a locking stop 42, and a positioning mark 26 arranged on the cover 18. The base 28 and the cover 18 structurally form the exterior of the main housing 12 in which the support 30 and the first guide rails 38.

[0023] According to the first embodiment of the invention, the support 30 includes a retaining groove 32 having a stopping surface 104. The retaining groove 32 divides the support 30 into a first and a second part 34, 36 symmetrical with respect to a vertical plane P comprising the longitudinal axis X.

[0024] The first receiving slot 24 is rectangular and defined by its longitudinal length and transverse width.

[0025] Each first guide rail 38 is arranged opposite a lateral edge 29 of the base 28 and is raised relative to the base 28 so as to leave a free space to receive part of the sliding element 48 inside the main housing 12. According to an unrepresented variant of this embodiment, the main housing 12 comprises only one first guide rail 38.

[0026] The main housing 12 includes a notch 44 arranged in the cover 18 forming an opening from the front face 14 of the main housing 12 to receive part of the sliding element 48 inside the main housing 12.

[0027] As illustrated in figures 1 And 2 , main housing 12 includes an arrow 27 shown on the cover 18 to indicate to the user the direction of insertion of the sheet 106 into the main housing 12.

[0028] The sliding element 48 as shown in isolation at the figure 3 understand : a shell 50 extending along the longitudinal axis X between a front edge 52 and a rear edge 54 and comprising an open lower portion 56 divided into two lateral sides 57 and a rounded upper portion 58, a second receiving slot 60 arranged in the upper portion 58 of the shell 50 and delimited transversely by two longitudinal sides 62, a closing wall 72 of the front face 14 of the main housing 12 arranged to bear against the front edge 52 of the shell 50, a nipple 74, visible at the figure 5 arranged in the closing wall 72 and extending along the longitudinal axis X, and two second guide rails 76 in translation along the longitudinal axis X each comprising a rear end 78 equipped with a locking stop 80.

[0029] The shell 50 comprises two elastic blades 64 arranged on either side of the second receiving slot 60 and each comprising a free end 66 arranged opposite the second receiving slot 60. The shell 50 may comprise a single elastic blade 64 arranged on one side of the second receiving slot 60.

[0030] According to an unshown variant of the shell 50, the free end 66 of each elastic blade 64 forms one of the two longitudinal sides 62 of the second receiving slot 60. The shell 50 may comprise a single elastic blade 64 arranged on one side of the second receiving slot 60, the free end 66 of which forms a longitudinal side 62 of the second receiving slot 60. The other longitudinal side 62 is directly formed by the shell 50.

[0031] As illustrated in figures 6 And 7, the free end 66 of the elastic blade 64 has a rim 70 which extends radially towards the longitudinal axis X. Preferably, the free end 66 is at an angular distance D within the range ]0-45[ degrees with respect to the vertical plane P. Each elastic blade 64 is made for example by a partial cut of the shell 50.

[0032] The rear edge 54 of the hull 50 is in an arc and comprises: a shoulder 83 which extends radially towards the longitudinal axis X to an internal peripheral wall 84 so as to reduce the diameter of the rear edge 54, and two projections 85 arranged on the peripheral wall 84 of the shoulder 83, on each lateral side 57 of the lower portion 56 of the hull 50.

[0033] Each second guide rail 76 of the sliding element 48 is configured to cooperate with a first guide rail 38 of the main housing 12 between an open position and a closed position of the main housing 12. Each locking stop 80 of the second guide rails 76 is configured to cooperate with a locking stop 42 of the first guide rails 38 to stop the translation of the sliding element 48 in the main housing 12 in the open position of the main housing 12.

[0034] Each second guide rail 76 is arranged from a lateral side 57 of the lower portion 56 of the shell 50. According to an unrepresented variant of this embodiment, the sliding element 48 comprises a single second guide rail 76.

[0035] The sliding element 48 comprises two gripping zones 82 arranged on either side of the shell 50 and adjacent to the closing wall 72. Each gripping zone 82 of the sliding element 48 is intended to be received in a notch 44 of the cover 18 of the main housing 12.

[0036] The rotating element 86 as shown in isolation at the figure 4 understand : a cylindrical shaft 88 which extends along the longitudinal axis X between a first and a second end 90, 92, a third receiving slot 94 arranged in the shaft 88 and open to its second end 92, a wheel 100 attached to the first end 90 of the shaft 88, and a positioning mark 102 arranged on the wheel 100.

[0037] The second end 92 of the shaft 88 includes a blind hole 98 which extends along the longitudinal axis X and is configured to cooperate with the stud 74 of the closing wall 72 of the sliding element 48.

[0038] According to the first embodiment of the invention illustrated in the figure 4 , the third receiving slot 94 of the rotating element 86 is radially through.

[0039] As illustrated in figures 6 And 7 , the third receiving slot 94 has two chamfers 96 which extend along the longitudinal axis X. Preferably, each chamfer 96 is at an angular distance D1 within the interval ]0-45[ degrees with respect to the vertical plane P.

[0040] Preferably, the distance between the two projections 85 of the shoulder of the rear edge 54 of the shell 50 of the sliding element 48 is equal to the diameter of the shaft 88 of the rotating element 86. The projections 85 allow the rolled sheet 106 to be pulled during the translation of the sliding element 48 towards the open position of the main housing 12 until the sheet 106 is ejected from the rolling device 10.

[0041] According to an unrepresented variant, the diameter of the shoulder 83 of the rear edge 54 of the shell 50 of the sliding element 48 is equal to the diameter of the shaft 88 of the rotating element 86. In this case, the rolled sheet 106 is directly pulled by the shoulder 83 during the translation of the sliding element 48. In addition, the peripheral wall 84 of the shoulder is smooth and does not have any projections 85.

[0042] As illustrated in figures 1 And 4 , the rotating element 86 includes an arrow 103 represented on the wheel 100 to indicate to the user the direction of rotation of the wheel 100.

[0043] In a mounted and open position of the rolling device 10 as shown in the figure 5 : The shell 50 of the sliding element 48 is configured to be housed inside the main housing 12, from the front face 14 of the main housing 12, and the shaft 88 of the rotating element 86 is configured to be housed inside the main housing 12, from the rear face 16 of the main housing 12 visible at the figure 2 .

[0044] The arrangement of the various elements in the closed position of the rolling device 10, as shown in figures 6 And 7 is as follows: the upper portion 58 of the shell 50 and the free end 66 of the elastic blade 64 of the shell 50 of the sliding element 48 are opposite the shaft 88 of the rotating element 86 and are positioned above the shaft 88 along the vertical axis V, and the support 30 of the main housing 12 and the stopping surface 104 are opposite the shaft 88 of the rotating element 86 and are positioned below the shaft 88 along the vertical axis V.

[0045] The arrangement of receiving slots 24, 60 and 94 in the closed position of the rolling device is as follows: the first and second receiving slots 24, 60 are aligned along the same vertical plane P, the second receiving slot 60 is arranged between the first receiving slot 24 and the shaft 88 of the rotating element 86 along the vertical axis V, and the first and second receiving slots 24, 60 are aligned with the retaining groove 32 along the same vertical plane P.

[0046] When the mark 26 of the main housing 12 and the mark 102 of the rotating element 86 are aligned, the third receiving slot 94 of the rotating element 86 is aligned with the first and second receiving slots 24, 60 along the same vertical plane P. The alignment of the three receiving slots 24, 60 and 94 is required to introduce the sheet 106 into the rolling device 10.

[0047] Furthermore, when the marks 26, 102 are aligned, the free end 66 of the elastic blade 64 of the shell 50 of the sliding element 48 is aligned with the chamfer 96 of the third receiving slot 94 of the rotating element 86 at the same angular distance D, D1 with respect to the vertical plane P. This angle formed by the free end 66 and the chamfer 96 facilitates the folding of the sheet 106 during rolling.

[0048] The unrolled sheet 106 shown at the figure 6 extends between a first and a second endpoint 108, 110 defining its length.

[0049] There figure 8 illustrates the sheet 106 rolled into a cylinder shape by the rolling device 10 according to the invention comprising: the first end 108 inside the rolled sheet 106 and the second end 110 outside the rolled sheet 106, an internal partition 112 extending along the entire diameter of the cylinder of the rolled sheet 106, and a folded area 114 comprising the first end 108.

[0050] The inner partition 112 is configured to reinforce the rolled sheet 106 in order to limit its crushing and also to improve the filtering capacity of the rolled sheet 106. The folded area 114 rests against an internal section 116 of the rolled sheet 106.

[0051] According to one embodiment of sheet 106, the folded area 114 is pre-glued so that it is fixed by gluing against the inner section 116 to hold sheet 106 in the rolled position. The pre-glued folded area 114 of sheet 106 has a layer of glue applied before the sheet 106 is rolled.

[0052] According to a second embodiment of the invention shown in the figure 9 The third receiving slot 94 is radially through-hole, and the support 30 of the main housing 12 has a continuous stopping surface 104. The geometry of the support 30 in this embodiment is simplified due to the absence of a retaining groove 32.

[0053] According to a third embodiment of the invention shown in the figure 10 , the third receiving slot of the rotating element extends only along a portion of the diameter of the shaft 88 of the rotating element 86 and includes the stopping surface 104. The geometry of the support 30 of this embodiment is simplified due to the absence of a retaining groove 32.

[0054] The method of rolling a sheet 106 of paper or cardboard using a rolling device 12 according to the invention by a user comprises the following successive steps: 1. Mounting the sliding element 48 with the main housing 12 by the user by inserting the shell 50 of the sliding element 48 from the front face 14 of the main housing 12; 2. Mounting the rotating element 86 with the main housing 12 by the user by inserting the shaft 88 of the rotating element 86 from the rear face 16 of the main housing 12; 3. Aligning the mark 102 of the rotating element 86 with the mark 26 of the main housing 12 by rotating the knob 100 of the rotating element 86; If the selected sheet 106 has a pre-glued area: 5 Location of the face containing the pre-glued area of ​​sheet 106, and orientation of sheet 106 so that the face containing the pre-glued area is opposite the arrow 27 of the main housing 12 and engaged first in the receiving slots 24, 60, 94; If the selected sheet 106 does not have a pre-glued area: proceed from step 4 to step 6 without completing step 5. 6 Introduction of the first pre-glued end 108 of the sheet 106 into the main housing 10, through the first, second and third receiving slots 24, 60, 94 until the sheet 106 is butted against the stop surface 104; If sheet 106 has a pre-glued area: 7A Rotation of the wheel 100 of the rotating element 86 by the user in a direction indicated by the arrow 103 of the wheel 100 of the rotating element 86; If the selected sheet 106 does not have a pre-glued area: 7B Rotation of the wheel 100 of the rotating element 86 by the user in a direction determined randomly by the user; and 8 Translation of the sliding element 48 until the main housing 12 of the rolling device 10 is open and the locking stops 42 and 80 are in contact corresponding to the complete opening of the main housing.

[0055] After the completion of steps 1 and 2, the main housing 12 is in a closed position and the first and second receiving slots 24, 60 are aligned along the vertical plane P. Following step 3, the third receiving slot 94 is aligned with the first and second receiving slots 24, 60 of the rolling device 10.

[0056] For steps 7A and 7B, the rotation of the roller 100 is carried out until the second end 110 of the sheet 106 is inserted into the rolling device 10, then the roller 100 is rotated by at least one additional turn to ensure that the sheet 106 is fully rolled around the shaft 88 of the rotating element 86.

[0057] During the 7A or 7B rotation step of the wheel 100 of the rotating element 86, the third receiving slot 94 of the rotating element 86 drives the sheet 106 guided by the convex shape of the support 30 of the main housing 12 and held against the shaft 88 of the rotating element 86 by the free end 66 of the elastic blade 64 of the shell 50 of the sliding element 48.

[0058] Preferably, step 8 of translation of the sliding element is carried out by the user by applying pressure to each of the two gripping areas 82 of the sliding element 48 while holding the main housing 12.

[0059] During step 8 of translation of the sliding element 48 the shoulder 83 of the rear edge 54 of the shell 50 of the sliding element 48 pulls the rolled sheet 106 until its expulsion from the rolling device 10 by the lower open portion 56 of the shell 50 of the sliding element 48.

[0060] According to the first embodiment of the rolling device 10, step 6 of introducing the first end 108 of the sheet 106 is carried out up to the retaining groove 32 having the stopping surface 104. Therefore, at the beginning of step 7A or 7B of rotation of the roller 100 of the rotating element 86, the first end 108 of the sheet 106 is held in the retaining groove 32 to form the folded area 114 of the rolled sheet 106.

[0061] According to the second embodiment of the invention, step 6 of introducing the first end 108 of the sheet 106 is carried out up to the support 30 having the stop surface 104. The sheet 106 rolled according to this embodiment does not have a folded area 114.

[0062] According to the third embodiment of the invention, step 6 of introducing the first end 108 of the sheet 106 is carried out up to the third receiving slot 94 having the stopping surface 104. The sheet 106 rolled according to this embodiment does not have a folded area 114 and the internal partition 112 extends only along a portion of the diameter of the cylinder of the rolled sheet 106.

[0063] The use of a rolling device 10 according to the invention, in the form of a compact, pocket-sized device, offers an alternative to manually rolling the rolling paper 106. Such a device is configured for the individual formation of filters, producing rolling cigarette filters that all have a similar geometry and, more specifically, a substantially identical diameter determined by the diameter of the shaft 88 of the rotating element. Furthermore, the presence of a third receiving slot 94 of the rotating element 86 allows, firstly, the rolling paper 106 to be drawn in during the rotation of the wheel 100 of the rotating element 86, and secondly, the formation of the internal partition 112, which stiffens the structure of the rolled rolling paper 106 and improves its filtering capacity when used in a rolling cigarette.

Claims

1. Pocket rolling device (10) for a sheet of paper or cardboard, including a rotary element (86) rotatably movable along a longitudinal axis (X) comprising a cylindrical shaft (88) delimited between a first and a second end (90, 92) and including a receiving slot (94) open up to its second end (92), rolling device (10) characterised in that it comprises: - a main casing (12) which extends along the longitudinal axis (X) between a front face (14) and a rear face (16) and comprising an external cap (18) which includes a first receiving slot (24), - a sliding element (48) translationally movably mounted along the longitudinal axis (X) in the main casing (12), from the front face (14) of the main casing (12), between an open position and a closed position of the main casing (12), the sliding element (48) comprising: . a shell (50) which extends along the longitudinal axis (X) between a front edge (52) and a rear edge (54) and comprising a rounded upper portion (58) including a second receiving slot (60), and . a wall (72) for closing the front face of the main casing (12), - the rotary element (86) comprising: . the shaft (88) housed inside the main casing (12), from the rear face (16) of the main casing (12), the receiving slot of the shaft (88) forming a third receiving slot (94), and . an adjustment wheel (100) integral with the first end (90) of the shaft (88), - a stop surface (104); and in that in the closed position of the rolling device (10): - the first and second receiving slots (24, 60) are aligned along a same vertical plane (P) comprising the longitudinal axis (X), - the second receiving slot (60) is arranged between the first receiving slot (27) and the shaft (88) of the rotary element (86) along a vertical axis (V), and - the rounded upper portion (58) of the shell (50) of the sliding element (48) is arranged opposite the shaft (88) of the rotary element (86).

2. Rolling device (10) according to claim 1, characterised in that the third receiving slot (94) of the rotary element (86) is a radial through slot.

3. Rolling device (10) according to claim 2, characterised in that it comprises a support (30) including the stop surface (104) facing the first slot (24).

4. Rolling device (10) according to claim 2, characterised: - in that it comprises a support (30) in which a holding groove (32) including the stop surface (104) facing the shaft (88) of the rotary element (86) is arranged, - and in that the holding groove (32) is aligned with the first and second receiving slots (24, 60) along the same vertical plane P.

5. Rolling device (10) according to claim 1, characterised in that the third receiving slot (94) of the rotary element (86) extends only along a portion of the diameter of the shaft (88) of the rotary element (86) and includes the stop surface (104).

6. Rolling device (10) according to any of the preceding claims, characterised: - in that the closing wall (72) of the sliding element (48) includes a stud (74) cooperating with a blind hole (98) arranged at the second end (92) of the shaft (88) of the rotary element (86), - and in that the stud (74) and the hole (98) are aligned along the longitudinal axis (X).

7. Rolling device (10) according to any of the preceding claims, characterised in that the main casing (12) includes at least one first rail (38) for translational guiding along the longitudinal axis (X) cooperating with at least one second guide rail (76) of the sliding element (48).

8. Rolling device (10) according to any of the preceding claims, characterised in that at least one of the first and second guide rails (38, 76) includes an abutment (42, 80) for translational blocking.

9. Rolling device (10) according to any of the preceding claims, characterised in that the shell (50) of the sliding element (48) includes at least one elastic blade (64) comprising a free end (66) arranged opposite the shaft (88) of the rotary element (86).

10. Rolling device (10) according to claim 9, characterised: - in that the second slot (60) of the sliding element (48) is delimited by two longitudinal sides (62), - and in that the free end (66) of the elastic blade (64) forms one of the two longitudinal sides (62) of the second receiving slot (60).

11. Rolling device (10) according to claim 10, characterised in that the free end (66) of the elastic blade (64) is at an angular distance (D) in the ]0-45[ degrees interval relative to the vertical plane (P).

12. Rolling device (10) according to any of the preceding claims, characterised: - in that the main casing (12) and the rotary element (86) each have a positioning mark (26, 102), - and in that when the marks (26, 102) are aligned, the third receiving slot (94) of the rotary element (86) is aligned with the first and second receiving slots (24, 60) along the same vertical plane (P).

13. Rolling device (10) according to any of the preceding claims, characterised in that the rear edge (54) of the shell (50) of the sliding element (48) comprises a shoulder (83) which extends radially towards the longitudinal axis (X) and the inner diameter of which is equal to the diameter of the shaft of the rotary element (86).

14. Rolling device (10) according to any of the preceding claims, characterised in that the shell (50) of the sliding element (48) includes an open lower portion (56).

15. Method for rolling a sheet of paper or cardboard with the use of a rolling device (10) according to any of the preceding claims, the rolling method includes the following steps: - aligning the first, second and third receiving slots (24, 60, 94) of the rolling device (10) along the same vertical plane (P), - introducing the sheet into the main casing, through the first, second and third receiving slots (24, 60, 94) of the rolling device (10) up to the stop surface (104), - rotating the adjustment wheel (100) of the rotary element (86) in a predetermined sense until the sheet is fully inserted into the rolling device (10), - translating the sliding element (48) up to the open position of the main casing (12) of the rolling device (10), and - expelling the rolled sheet (106) from the rolling device (10).

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