EP3044147A1

EP3044147A1 - Film dispenser and cutting blade

Info

Publication number: EP3044147A1
Application number: EP14771755.7A
Authority: EP
Inventors: Max Walder; Simon Buck; Eric SCHIESS
Original assignee: ALU-VERTRIEBSSTELLE AG
Current assignee: Star Foil Systems AG
Priority date: 2013-09-13
Filing date: 2014-09-12
Publication date: 2016-07-20
Anticipated expiration: 2034-09-12
Also published as: EP3044147B1; CH708564A2; WO2015035526A1

Abstract

The film dispenser comprises a folding box (3) in which a guide gap (17) that runs in a longitudinal direction is formed. A cutting blade (33) with two parallel guide plates is held on the folding box (3) in a movable manner along the guide gap (17). The folding box (3) comprises adhesive zones (27) adjacently to the guiding gap (17).

Description

Foil dispenser and cutting knife

The invention relates to a film dispenser and a cutting blade according to the preamble of claims 1 and 8.

Adhesion films are widely used in the gastro sector and in private households as cling films for

Used food. Such smooth plastic films are usually made of polyvinyl chloride (PVC) or polyethylene (PE) and adhere due to van der Waals forces on smooth surfaces without adhesive. This is desirable when such films are used to cover vascular openings or to pack food. However, the adhesive properties can also interfere if film areas adhere to one another in an undesired manner. Rolled adhesive films are usually stored in cardboard or corrugated cardboard containers. Often, such containers also serve as dispensers, from which film sections can be pulled out and separated by means of a separating device. Often, an edge of the container is designed as a finely serrated tear-off edge as a separating device. When removing pulled-out film sections at such tear-off edges parts of these film sections often remain in

adhere undesirably to each other. Alternatively, separators can also

Guide profile and along this guide profile slidably mounted cutting device with a

Include cutting blades.

From the patent application CH 699230 A2 is a

Foil dispenser known which comprises a container or housing with such a separation device. The housing is preferably manufactured as a disposable container made of cardboard or corrugated cardboard. The separator comprises a separate plastic profile which is attached to the upper front edge of the housing. The cutting device is slidably mounted on this plastic profile. Housing and separator of such film dispensers are stable compared to conventional containers made of thin cardboard. The cost and material requirements for the production of such film dispensers are comparatively high. This is even more so, as it concerns disposable containers. Such containers are disposed of after the film supply is exhausted. The ecological balance of such a disposable container still has room for improvement.

An object of the present invention is therefore to provide a simple and inexpensive to produce

Foil dispensers with an easy-to-use

To create separation device.

Another object of the invention is that, the

Forming film dispensers as a stackable container, the for storing and transporting a film roll can be used.

These objects are achieved by a film dispenser and by a cutting blade according to the features of patent claims 1 and 8.

Based on some figures, the invention described in more detail below. Show

Figure 1 with an open film dispenser with

inserted film roll,

Figure 2 is an open carton without

Adhesive strips,

3 shows an opened carton with

Adhesive strips on the front wall,

Figure 4 is a schematic front view of a

Foliendispensers with closed lid, Figure 5 is a detail view of the film dispenser in

Area of a gripping zone,

FIG. 6 shows a detail view of the film dispenser in FIG

Area of a depository for the

Film roll,

FIG. 7 a punched-out view of the folding box from FIG. 2 or 3,

Figure 8 is a cutting blade in perspective

View,

FIG. 9 shows the cutting blade of FIG. 8 in top view,

Figure 10 is a longitudinal section of the cutting blade

FIG. 8,

Figure 11 is a side view of the cutting blade

FIG. 8 transversely to the cutting direction, Figure 12 is a side view in the cutting direction of

Cutting blade of Figure 8,

FIG. 13 shows another cutting blade in FIG

perspective view,

Figure 14 is a side view of the cutting blade

FIG. 13 transverse to the cutting direction,

Figure 15 is a side view of the cutting blade

FIG. 13 in the cutting direction. FIG. 1 shows an opened film dispenser with a film roll 1 inserted. The film dispenser comprises a housing in the form of an elongated, essentially parallelepiped carton 3. The folding carton 3 can be made, for example, from cardboard or corrugated cardboard, preferably from cardboard with a wall thickness between about 0.5 mm and 1mm. A punched tear of this folding box 3 is shown in FIG. The punched edges are shown as bold lines, folding edges as thinner lines. Broken bold lines are perforation lines 15 for separating contiguous areas of the carton 3. The outer length LI of the carton hull 11 is located

for example, in the range of 20cm to 52cm. The width and the height of the box are preferably at least approximately the same size and are, for example, in the

Range from 35mm to 70mm. The width L2 of the wound on a sleeve-like core 5 Adhäsungsfolienbandes, called film 7 for short, is smaller than the length of the core 5, so that the core 5, the rolled-up film 7 on both sides axially preferably protrudes by about 10mm to about 40mm. The length of the core 5 is only slightly smaller - for example 5mm to 15mm - smaller than the outer length LI of the

Housing hull. Inside the frontal walls of the carton 3 bearings 9 are arranged for rotatably supporting the film roll 1. Alternatively, the bearings could be 9 offset from the frontal walls in the longitudinal direction of the carton 3 inward, so that conventional film rolls can be used without overlong cores 5 in the carton 3. The hull 11 includes an elongated rectangular bottom IIa, a similar rear wall IIb and front wall 11c and on both sides each have an end wall lld, ll. The end walls 11a and 11l are laterally hinged on the bottom 11a, on the front wall 11c and on the rear wall 11b, respectively, which are laterally articulated and overlap each other after folding into a box body 11. *** " At the upper edge of the rear wall IIb a hinged lid 13 is pivotally hinged. The hinged lid 13 comprises a rectangular ceiling 13a, one at the front edge thereof

adjacent front lobes 13b, which covers the front wall 11c of the hull 11 at least partially in the closed state, and two end-side wings 13c, 13d, cover at the closed lid 13 at least the upper region of the respective adjacent end walls lld, ll. The front flap 13b comprises at least one perforation line 15a, which the front flap 13b in a upper section 14 and a lower section 16 shares. Before the first use, the lower section 16

preferably adhered locally to the front wall 11c of the box body 11 by point bonding at a plurality of locations. Alternatively or additionally, a protruding at the bottom of section 16 tab 18 for

Connecting the lid 13 can be used with the hull 11. To open the housing for the first time, the lower portion 16 of the front flap 13b is separated from the upper portion 14 along the perforation line 15a. Figure 2 shows the empty carton 3 with partially unfolded cover 13, wherein the lower portion 16 of the front flap 13b has already been separated. On the front wall 11c of the carton 3 is about a

Much of the housing length a narrow guide gap 17 punched or otherwise excluded. The length L3 (FIG. 7) of this guide gap 17 is greater than the width L2 of the film 7 and smaller than the outer length LI of the box body 11

Front wall 11c between each of the column ends and the respective adjacent end wall lld, lle one each

gapless section whose width is of the order of 10-40mm. The width L4 (FIG. 7) of the

Guide gap 17 is of the order of about 1mm to about 4mm and is preferably 2mm to 3mm. The guide gap 17 is preferably approximately at mid-height of the front wall 11c parallel to its longitudinal edges arranged. Alternatively, the guide gap 17 may also be slightly higher or lower, preferably within the middle third of the wall height. In further alternative embodiments, the guide gap 17 could also be formed on the hinged lid 13 or on the rear wall IIb (not shown).

At the upper edge of the front wall 11c, a front inner wall 19 adjoins. It is by means of a fold 21a, preferably by means of two in a small mutual distance of for example 2mm to 5mm to each other

formed folds 21a, 21b pivoted hinged to the front wall 11c. The front inner wall 19 is folded inside the hull 11. It serves to stabilize the front wall 11c. When a film roll 1 is rotatably mounted in the folding box 3, the front inner wall 19 is resiliently against the film roll 1.

Approximately in the middle of the front wall 11c protrudes at the

Upper edge or at the front fold 21a a support tongue 23 forward. This can be like this

Embodiment along a semicircular

Perforation line 15b from the adjacent area of the

Front wall 11c separated and swung forward. The two ends of the perforation line 15b adjoin the front fold 21a. After pulling out and separating a film section is the front end of the

Foil supply on this support tongue 23 and can be taken easier. The support tongue 23 prevents that the film end in the middle area with the

Front wall 11c comes into contact and adheres to this. The perforation line 15b has a

sufficient distance to the guide gap 17, which may for example be between 5mm and 20mm.

As shown in FIG. 3, the front wall 11c on the outside comprises a dark-illustrated adhesive zone 27, on which one pulled out from the film roll 1

Film section releasably adheres when it is to be separated. The adhesive zone 27 preferably extends above and below the guide gap 17 over its entire length L3. In the region of the support tongue 23, the outside of the front wall 11c is formed without an adhesive zone 27 or with a non-adhesive zone 28, so that the film 7 can be gripped there more easily. In the embodiment illustrated in FIG. 3, a rectangular region is formed as adhesion-free zone 28 between the support tongue 23 and the guide gap 17, the length of which is approximately twice as long as the width of the support tongue 23. The adhesion-free zone 28 directly adjoins the guide gap 17 ,

Below the guide gap 17, the adhesive zone 27 is not interrupted.

Alternatively, the adhesive zone 27 could also comprise a plurality of non-contiguous regions which, with the exception of the adhesive-free zone 28, are distributedly formed on the front wall 11c. The adhesive zone 27 is as a coating with a smooth surface on the outside of the front wall 11c formed. This coating is preferably a self-adhesive plastic film, for example a

Plastic film made of polyvinyl chloride (PVC), polyester (PET), polypropylene (PP) or polyethylene (PE). Alternatively, another thin layer with a smooth

Surface are applied as an adhesive layer in the region of the adhesive zone 27 on the front wall 11c, for example, a paint or ink layer. The good adhesive properties for adhesive films 7 may be due to van der Waals forces and / or electrostatic forces.

Alternatively, a layer of a repositionable adhesive could also be applied or applied as an adhesive layer

two-sided adhesive tape are glued, one side of which is permanently adherent and the other side is reversibly adhesive. The width strip-shaped

Bonding zones 27 is preferably in the range of 2.5mm to 7.5mm and is for example 3mm or 4mm.

Figure 4 shows a film dispenser with a

Folded box 3, in which the lower portion 16 of the front flap 13b has already been separated. Above and below the guide gap 17, two strips of a self-adhesive film are adhered as an adhesive zone 27 on the front wall 11c, wherein above the guide gap 17, a rectangular adhesive zone 28 is recessed. Preferably, a single wide strip of the self-adhesive film is punched onto the front wall 11c or onto the fabric from which the punching tear for the folding box 3 is punched out is glued, before the punching in particular of the guide gap 17 takes place. This strip can project beyond the guide gap 17 on both sides and in turn comprises a recess for a non-adherent zone 28. As a result, the stability of the folding box 3 in the region of the

Guide gap 17 are additionally improved, which is particularly advantageous in thin sheet cardboard.

FIG. 5 shows a detailed view of the folding box 3 in the gripping area in the case of the tongue 23 projecting forwards.

FIG. 6 shows a detail of the folding box 3 in the region of one of the bearing points 9 seen from above

The two folds 21a, 21b on the upper edge of the front wall 11c and the inwardly folded front inner wall 19 can be clearly seen. Furthermore, one of the two retaining lugs 29 projecting outwardly from the upper edges of the end walls is illustrated. which the cover 13 in the closed position without the action of additional external forces by positive engagement with a shoulder 31 on the

Retain inside of the respective end wing 13c, 13d.

Figures 8 to 12 show different views of a cutting blade 33, which along the

Guide gap 17 guided in the longitudinal direction of the carton 3 is displaceable. 8 shows the cutting blade 33 in a perspective view obliquely from above, FIG. 9 in top view. FIG. 10 shows a section of the cutting blade 33 cut longitudinally along a blade 35. The blade 35 is trapezoidally made of knife steel, the two legs 37 being formed as cutting edges inclined at an angle relative to the longer base side, which is in the range of 25 ° to 45 °, and preferably 35 °. The longer base side of the blade 35 may, for example, have a length between 8mm and 14mm, preferably between 10mm and 12mm. The blade thickness is between 0.08 and 0.5mm and is preferably about 0.3mm. The height of the blade 35 is preferably between 2mm and 3mm and is for example 2.5mm. The cutting blade 33 comprises an upper guide plate 39 and a lower guide plate 41, which are arranged at a small distance A parallel to each other. This distance A is slightly larger than that

Wall thickness of the front wall 11c and is preferably in the range of 1mm to 3mm, in particular between 1.5mm and 2.5mm. The thickness B of the lower guide plate 41 is preferably in the range of 0.3mm to 1.3mm and is for example 0.5mm. The two guide plates 39, 41 have approximately a rectangular basic shape with rounded corners and side edges. The lower one

Guide plate 41 is flat. The upper guide plate 39 has a larger plate thickness C in the order of about 1mm to about 2mm. To the side edges located in the direction of displacement, the upper guide plate 39 is arched upwards. Your length D in this Displacement direction, for example, between 15mm and 25mm, preferably between 15mm and 20mm. The length E of the lower guide plate 41 in this

Displacement direction is preferably about 2mm to 5mm smaller than the length D. The length F of the upper

Guide plate 39 is transverse to the direction of displacement

at least approximately the same size as the length D in the direction of displacement. The length G of the lower guide plate 41 transverse to the direction of displacement, however, is slightly, for example, by 5% to 10% larger than the corresponding length F of the upper guide plate 39. At the top

Guide plate 39 projects centrally a gripping knob 43 upwards. This can e.g. the figure of one above

have flattened ball. The total height H of the

Cutting knife 33 is preferably less than 10mm, for example 7mm. The maximum height K of the upper

Guide plate 39 with respect to the underside of the lower guide plate 41 is preferably smaller than the total height H of the upwardly curved ends

Cutting blade 33. The blade 35 is so embedded in a narrow, centrally between the two guide plates 39, 41 arranged web 45, that the longer

Base side at the upper guide plate 39 and the shorter side at the lower guide plate 41 are located, and that only the leg portions with the two

Protruding cutting edges 37. The blade 35 is oriented orthogonal to the planes of the guide plates 39, 41 and preferably comprises a bore (not shown) a positive secure connection with the web 45 allows. Preferably, the cutting blade 33 is produced by injection molding, wherein the blade 35 is partially injected into the web 45. The web 45 has a width M of, for example, 2mm to 3mm. This width M is matched to the width of the guide gap 17, that the cutting blade 33 with little play along this guide gap 17 is displaced. The web 45 may have an upwardly linear or progressively increasing length. The cutting blade 33 can in the

Guide gap 17 of the hull 11 are used by the adjacent to the guide gap 17 areas of the front wall 11 c arched forward and in the

Interspace between the guide plates 39, 41

be introduced. When the cover 13 is closed, the upper portion of the front flap 13b, depending on

Embodiment, the cutting blade 33 completely, partially or not cover. The perforation line 15b may be rectilinear as in the illustrated embodiment. Alternatively, the perforation line 15b may be so

be arranged so that the lower edge of the upper portion 14 of the front flap 13b is higher in the central region than at the front end portions, as indicated in Figure 4 by the dotted line 40. The

Cutting knife 33 can be at least approximately taken along the full length of the guide gap 17 better with the fingers of one hand and moved. Before the first use, ie before the demolition of the lower one Section 16 of the front flap 13 b, this front flap 13 b completely covers the guide gap 17 and the cutting blade 33.

Figures 13 to 15 show a further embodiment of a cutting blade 33 in order in a perspective view, in a side view across and in a

Side view in the cutting direction. The gripping knob 43 extends in the cutting direction over the entire length of the cutting blade 33. The top of the gripping knob 43 is slightly concave curved in the cutting direction. It comprises a corrugation transverse to the cutting direction and can be easily moved with only one finger along the guide gap 17. At the lower guide plate 41 protrude

Stop elements 47 upwards. These are, when the cutting blade 33 is inserted into the guide gap 17, on the inner surface of the carton 3 at. As a result, the range of motion of the cutting blade 33rd

limited and the underside of the upper guide plate 39 presses the film to be cut 7 slightly resiliently to the side of the guide gap 17 arranged adhesive zones 27. Preferably, the stop elements 47 are formed as runners upwardly curved side edges of the lower guide plate 41. The height L of the stop members 47 depends on the material thickness of the carton 3 in

Area of the guide gap 17 and the distance A of the two guide plates 39, 41, wherein this distance A is preferably equal to or greater than the height L of the stop elements 47. Preferably, the distance A Also smaller or equal to the sum of the material thickness of the carton 3 and the height L of the stop elements 47. Thus, for example, in a material thickness of the carton 3 of 0.4mm, the distance A 2.2mm and the height L 1.9mm. Seen in the cutting direction are the

Stop elements 47 preferably arranged offset relative to the edges of the upper guide plate 39 slightly outwards, so that a material-free gap is formed whose width M is dimensioned so that the cutting blade 33 can be easily inserted into the guide slot 17 of the carton 3.

It is particularly advantageous, the two guide plates 39, 41, the interposed web 45 and the gripping knob 43 as a one-piece injection molded part

Form plastic, wherein each two complementary halves of each area via a Fiimscharnier 49 on the underside of the lower guide plate 41 are interconnected. This allows an efficient

Production of such cutting blade, wherein the blade 35 is inserted into a corresponding receptacle of the web 45 and then folded the two halves and firmly connected to each other. This connection can be done for example by means of locking elements, by gluing or by ultrasonic welding, as is well known from the prior art.

Claims

claims

1. film dispenser, comprising an elongated

Folding box (3) with a box hull (11) consisting of a bottom (IIa), a front wall (11c), a rear wall (IIb) and two end walls (lld, ll) and having a cover side, these

Folding box (3) for storing a film roll (1) with an elongated core (5) rolled up adhesion film (7) is formed, and wherein

Film sections of the film roll (1) through a take-off slot from the carton (3) can be pulled and separated by a separator, characterized in that the separating device comprises a longitudinally slidably mounted cutting blade (33), and that the longitudinal guide on the front wall (11c) or the rear wall (IIb) or the cover side of the carton (3) recessed guide gap (17).

2. film dispenser according to claim 1, characterized

characterized in that the length L3 of the guide gap (17) is shorter than the outer length LI of the

Box hull (11), such that adjacent to the ends of the guide gap (17) each have a gap-free section with a width between 10mm and 40mm remains.

Foil dispenser according to one of claims 1 or 2, characterized in that along the

Guiding gap (17) on both sides of an adhesive zone (27) is formed, wherein on one side of the

Guiding gap (17) a section as non-adherent Z (28) is excluded. 4. film dispenser according to claim 3, characterized

characterized in that the adhesive zone (27) has a smooth surface and a self-adhesive

Plastic film or a coating of paint or color comprises, or that the adhesive zone (27) comprises a removable adhesive.

5. film dispenser according to one of claims 1 to 4, characterized in that the side of the

Guide gap (17) an outwardly projecting tongue (23) is arranged.

A film dispenser according to any one of claims 1 to 5, wherein the guide gap (17) is recessed on the front wall (11c), characterized in that a front inner wall (19) is formed by means of one or two folds (21a, 21b) at the top of the front wall (11c ) hinged and folded into the interior of the hull (11).

7. Folxendispenser according to one of claims 1 to 6,

characterized in that the cover page a

Hinged lid (13) having a front flap (13b) with an upper portion (14) and one through a

Perforation line (15b) detachably connected to the upper portion (14) connected to the lower portion (16), wherein the perforation line (15b) is arranged at the closed hinged lid (13) at least along a central portion above the guide gap (17).

Cutting knife (33) for a Folxendispenser according to one of claims 1 to 7, characterized in that two parallel guide plates (39, 41) by a centrally disposed web (45) are interconnected, that a blade (35) formed with two as cutting edges Legs (37) so embedded in this bridge (45) that the

Cutting edges on both sides of the web (45) protrude, and that the width (M) of the web (45) and the distance (A) of the guide plates (39, 41) so on the width of the guide gap (17) and on the material thickness of the carton (45). 3) are adapted adjacent to the guide gap (17) that the cutting blade (33) along the guide gap (17) is slidably guided.

9. cutting blade (33) according to claim 8, characterized

characterized in that on the upper guide plate (39), a gripping knob (43) projects upwards, and that the

Total height (H) of the cutting blade (33) is less than 10 mm.

Cutting knife (33) according to one of claims 8 or 9, characterized in that at the bottom

Guide plate (41) stop elements (47) for

Limiting the range of motion by attaching to the inner surface of the carton (3) projecting upwards.

Cutting knife (33) according to one of claims 8 to 10, characterized in that the guide plates (39, 41) and the web (45) are formed as a one-piece plastic injection molded part, wherein two

Complementary portions are connected by a film hinge (49).