Cutting device and film dispenser with such cutting device.

[0001] object of the invention is a cutting device according to the preamble of claims 1 and 8 and a film dispensing.

[0002] rolled films such as adhesion film, or reduction in area are used in households, often in cardboard or corrugated paper containers are mounted. Usually the container are formed also as a dispenser, which can be extracted and separated by means of a separator film sections.

[0003] from the patent application GB 699,230 a2 is a film dispensing known, with such a separator comprises a housing. The housing is manufactured as a disposable container made of cardboard or corrugated cardboard. The separator includes a separate plastic profile, which is attached to the upper front edge of the housing and a cutting device with a cutting blade slidably mounted on this plastic profile. Housing and separator film such dispensers are comparatively stable and easy to operate. The material cost and the manufacturing costs are compared to films but dispensers, made of cardboard and thinner as separating device comprise a cutter, significantly higher. There is also potential for improving such environmentally dispensers, if these are used as disposable devices, after complete consumption of the film are disposed the supply. Another film dispenser is known from WO 2006, 096, 187, its housing is designed as a paperboard carton. A longitudinal slot on the cover or on a longitudinal wall of the folding box serves as a guide means for a cutting device generally. The cutting device includes a neck having two blades, a foot part and a head part disposed between. Foot are substantially wider and longer than the width of the head - and guide gap, which corresponds approximately to the width of the neck transversely to the cutting direction. A slight rotation of the cutting device in such film dispensers during displacement along the guide gap can already cause, the front blade adjacent the longitudinal wall of the folding box in the displacement direction that damaged on the guide gap. This undesirable effect is particularly strong, when the carton is made of relatively thin-walled and/or cardboard when the cutter is mounted with too much play on the longitudinal wall with the guide gap.

[0004] for attaching the cutting device during the cutting device can be constructed in two parts on the longitudinal wall guide gap, wherein the foot part is fastened from the inside by means of a snap connection neck, from the outside through the guide gap at the longitudinal wall after it has been introduced. The production and assembling of such cutting devices are complicated and expensive directly on the housing.

[0005] can alternatively the longitudinal slot at one of its ends a larger opening for insertion of the cutting device comprise. This requires unnecessarily long lengths and also poses the risk housing, in the region of the openings go jump from the guide that cutting devices and lost.

[0006] it is therefore a task of the present invention, a cutting device and a film dispenser with a cutting device to create, simply and economically produced to operate the are. This problem is solved by a cutting device according to the features of claims 1 and by a film dispensing and 8.

[0007] an exemplary embodiment of the invention hereinafter using some Figures is described in more detail. This show

Figure. 1 perspective view a cutting device,

Figure. 2 a top view of the cutting device from Figure. 1,

Figure. 3 a front view of the cutting device from figFig. 1 transversely to the cutting direction,

Figure. 4 a side view of the cutting device of figFig. 1 as seen in the cutting direction,

Figure. 5 a perspective view of the cutting device of figFig. 1 in the unfolded state,

Figure. 6 a of the cutting device along the line L-L is in the Figure oürschnitt. 3,

Figure. 7 oürschnitt a region of the cutting device of a dispenser.

[0008] in the Figure. a preferred embodiment of a invention 1a 4 is shown in different directions of view 1 formed cutting device. It comprises a head part 3, with a sliding base 3a and a handle 3d, serves for manually shifting in a cutting direction sec, 1 when the cutter at a folding box 51 is supported along the first guide gap 53 on an external guide wall 55 (figFig. 7) of the folding box 51 slidably. In this document where otherwise mentioned, the term "in the cutting direction sec" is to understand, the opposite direction in that it also comprises the cutting direction seconds. The sliding base has a planar sliding portion 3a 3b 3c and two seconds in the cutting direction opposite end portions, which are bent upward like a blade. These end portions 3c and the rounded corners of the sliding base 3a help, upon displacement of the cutting device 1 that a film to be cut in the cutting direction on the head part 3 or hooks s adheres.

In the cutting direction s is the sliding base 3a extends over a length l1, 15 mm to 30 mm and 20 mm for example which is preferably in the range of is. The width of the sliding base corresponds approximately to the length l1 b1 3a preferably. In the middle of the slider portion 3b projects downwardly a first neck portion 5, the width of which corresponds approximately to the width of the first sec b2 transversely to the cutting direction guide gap 53 on the folding box 51. 1 when the cutter is mounted on the folding box 51, the first neck portion 5 with little play by the first guiding gap 53 projects into the interior of the folding box 51. The first neck portion 5 acts as guide means therefore, prevents the translation movements of the cutter 1 transversely to the cutting direction or delimits sec, in the cutting direction but permits seconds. The cutting device 1 further comprises a first guide member having a first guide plate arranged parallel to the sliding portion 7 3b 7a. The length and the width of said first guide plate are similar or 7a l3 b3 slightly greater than that of the sliding base of the head portion preferably projects beyond the guide plate 3a 3rd Generation the sliding base in the cutting direction or longitudinal direction and 7a 3a sec about one to two millimeters on each of said sides transversely thereto.

[0009] the first neck portion 5 serves as a support or spacer, the head portion 3 and the first guide member 7 preferably in the middle of the sliding base and the first guide plate and interconnecting these parts 3a 7a holds spaced apart from one another. The first guide plate defines a first guide space together with the sliding base 7a 3a, 3b in the region of the sliding portion having a height HL, 1 mm to 5 mm and 2 mm for example which is preferably in the range of is.

[0010] s is the length of the first neck portion in the cutting direction is from a length l2 l2 5" at the first guide member 7 to a length L2 ' to the head part 3. The increase in length can be a linear or preferably a progressive function of altitude over l2 the first guide plate 7a. In the first neck portion 5 a blade 9 is embedded, which preferably has an inverted trapezoidal shape. At least one, preferably both legs of the blade 9 are formed in the cutting direction as sharpened cutting edges 9a and project beyond neck portion via the first 5 seconds. In the exit areas of the first neck portion 5 is chamfered blade 9, so that its width decreases towards b2 for blade 9.

[0011] at the first guide plate 7a along the two longitudinal edges 7b contact elements preferably project upwardly, the height of which is somewhat smaller than the height HL of the first guiding chamber. The height difference between the level of the underside of the sliding base and the level of the upper edges of the contact elements is sized 3a 7b, corresponds at least approximately to the material thickness of the guide gap 53 adjacent to the first portions of the folding box 51 (not shown) accommodated therein including a film portion. This causes, that the movement of the cutting device is orthogonally to the plane of the guide plate 1 margin limited 7a, in neck so direction, . The sliding section 3b is therefore held on the outer wall of the outer guide wall 55 of the folding box 51 or adjacent one or there adjacent foil section. The game for movements of the cutting device 1 in neck direction, i.e. orthogonal to the outer guide wall 55, is minimal. The cutting device 1 may smoothly along the first guide gap 53 are displaced. Here the film section in the cutting direction to be separated by the second curved end portion of the sliding base 3a 3c high front is smoothly with little pressure applied to the first guiding gap 53 defining portions of the outer guide wall 55, before it is severed from the front cutting edge 9a in a defined position.

[0012] a second neck portion at the bottom of the first guide plate 15 projects downwardly 7a, its width transversely to the cutting direction approximately to the width of a second guide b4 sec 63 gap on an inner guide wall 65 of the folding box 51 (figFig. 7) corresponds. Preferably the second neck portion extends at least approximately over the entire length of the first guide plate 15 l3 7a. The second neck portion 15 and a second guide plate parallel to said first guide plate 7a spaced 17a or a second guide member and said first guide plate 7a of 17th generally said second guide plate 17a connects a second guide space limit, the height of which corresponds approximately to the material thickness of the inner guide wall 65 or slightly h2 preferably greater than this is, so that the displacement of the cutting device 1 in the cutting direction is not obstructed seconds. The width of the second guide plate 17a is significantly smaller than the width b5 b3 7a and the first guide plate in the range of 25% to 75% for example a value that b3 width. This facilitates insertion of the cutting device 1 into the two guide gaps 53, 63 on the guide walls 55, 65. Since the material of the guide walls is 55, 65 comparatively thin and bending elastically, the cutting device 1 as a whole can be easily inserted about in the middle of the guide gaps 53, 55. A larger insertion opening at the ends of the guide gaps 53.55 is not necessary. Figure. 5 shows the cutting device 1 in the open state, Figure. 6 a cross-section of the cutting device 1. The blade 9 is made of metal or other hard material such as glass fiber reinforced plastic (GRP) and embedded in a plastic body, comprising the head portion 3, the first neck portion 5, the first guide member 7, the second neck portion 15 and the second guide elements 17. The plastic body comprises two halves, which are connected in a predetermined plane by the arrangement of the blade 9 contiguous and together. Preferably the two halves of the plastic body are connected via a film hinge 19 on the underside of the second guide plate hingedly 17a. This allows a cost-effective production of the plastic body as a one-piece injection molded part and a simple assembly of the two halves, when the blade 9 is held in the desired position on one of the halves by aligning means of the plastic body. Alternatively or additionally other techniques such as ultrasonic welding or bonding compound may be used for connecting the parts. In another alternative embodiment the blade 9 inserted in the preparation of the plastic into the mold and could also in the region between the cutting edges 9a are directly extrusion-coated with plastic. The film hinge 19 over the entire length of the second guide plate 17a l4 can extend. Wherein in Figure. 5 shown embodiment comprise the alignment means on one half of the plastic body a three on the parting plane 21 and on the other half of the bolt protruding alignment pin receptacles corresponding plastic body and at least one of the two halves of the head part 23 3 9 matched to the contour of the blade, a blade edge region of the head part 3 limited by slightly higher bed 25. The blade 9 9c comprises recesses, which are arranged and designed such, that the parting plane transverse blade 9 can be pushed with little play on the alignment pin 21. The alignment pin 21 define the position of the blade in the parting plane 9 and prevent movement relative to the head part 3 within the parting plane.

[0013] when the two halves of the plastic body are collapsed completely, so that they abut one another, the alignment pin into the pin housings 23 21 engage a. Characterized in that the two halves of the plastic body are held in a defined position relative to each other and at the same time secured position of the blade 9 in the parting plane.

[0014] 21 and 23 are analogous to the alignment pin on the two halves of the plastic body the pin housings together corresponding connecting elements arranged, for example excellent locking bolt 31 and recessed stop bolt 33 seats, the two folded halves of the plastic body which in the closed position by means of a mold - or force-fitting connection secure.

[0015] Figure. 7 shows the cross section of a film dispenser. It comprises a folding box 51, wherein a outer wall is formed as outer guide wall 55. The inner guide wall 65 is formed on a portion of the folding box 51, adjoins the outer guide wall 55 and one of the longitudinal edges is folded several times about 90° parallel to this longitudinal edge. Subsequently to the first guide wall 55 in sequence a first connecting portion 57 consequences, a protective wall 75, a second connecting portion 59 and then the inner guide wall 65. The lengths of the first connecting portion and second connecting portion 57 59 are coordinated so the cutter 1, in that the second guide wall 65 is arranged at a distance from the first guide wall 55, which corresponds to the level of the second guiding chamber, when the sliding portion 3 of the head portion abuts on the outer guide wall 55 3b and projecting to the outer guide gaps 53, 63 adjacent portions of said guide walls 55, 65 into the associated guide spaces. The length of the second connection portion 59 is dimensioned as small as possible h4, but large enough, that the second guide member 17 is hampered or said second guide plate during displacement of the cutter in the cutting direction s 17a 1.

[0016] the protective wall 75 inside the folding box 51 protects a film roll (not shown) is mounted, so that they can be damaged by the cutting device not 1, when in the cutting direction is displaced seconds. Generally corners and edges of the cutting device are rounded. This promotes the ease of displacement of the cutting device 1 and also bears in this, that the folding box 51 and foil are not damaged during displacement.

[0017] the material thickness of the folding box 51 is preferably in the range of 0.4 mm to 1 mm. This also applies to the thicknesses of the first guide plate and the second guide plate 7a 7b.

[0018] the inner guide wall 65 in alternative embodiments of the folding box 51 could also be formed as a loose insert wall.

[0019] the comparatively small overall height of the cutting device 1 allows good use of the space for the film roll from the folding box 51 male. Characterized in that the comparatively compact folding boxes 51 can be produced.

[0020] the guide gaps 53, 63 must not necessarily in the middle of the guide walls 55, 65 be arranged, one of the longitudinal edges of the guide walls they can also lead to 55, 65 be arranged offset toward, wherein must be ensured, that the cutting device can be displaced freely in the cutting direction 51 seconds.

The flat construction of the cutting device 1, in particular the second guide plate 17a ensures, in a dispenser mounted that a film roll can even without film dispensers cannot be damaged by the cutting device 1 protective wall 75.

[0021] the inner guide wall at one or more locations within the folding box 51 65 can in position fixed against undesirable movements or be secured in one or more directions. Preferably the width and the length of the second guide wall 55 also optionally are adapted so the inner mass of the folding box 51, the inner guide wall 65 be prevented that movements in the respective directions within the folding box 51. The long and/or one or more short side edges of the inner guide wall 65 can optionally be formed or folded - terminal connecting portions 59, the stop elements for setting or limiting the position of the can as spacers or inner guide wall 65 be used within the folding box 51.

[0022] 1 when the cutter is mounted on the folding box 51, the second neck portion extends through the second guide slot 63 15 with little play further into the interior of the folding box 51. The second neck portion acts as an additional guide means 15 therefore, prevents the translation movements of the cutter 1 transversely to the cutting direction or delimits sec, in the cutting direction but permits seconds. Since the two guide walls 55, 65 and the associated neck portions 5, 15 arranged orthogonally spaced each other, causing an improved protection against undesired tilting or pivoting movements together the cutting device 1, for example when a torque with respect to the cutting direction s and/or with respect to the neck towards the cutting device 1. Since the second neck portion 15 seconds beyond the cutting edges in the cutting direction 9a, upon displacement of the cutting device in the cutting direction he is at the end of the second guide slot 63 1 sec on the inner guide wall 65, before the cutting edge at the end of the first guide gap 9a can damage the outer guide wall 53 55.