# US 2014/0151374 A1 · Cutting device for container coverings

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- Number: US 2014/0151374 A1
- Document ID: US20140151374A1
- Status: Published application
- Kind: A1
- Application number: 14/236,889
- Filed: 2012-06-04
- Published: 2014-06-05
- Earliest claimed: 2011-08-01
- Assignees: Robert Bosch GmbH
- Inventors: Dan Barron
- Web page: https://patentgrep.com/patent/US20140151374A1

## CPC

- B65D 17/34: Arrangement or construction of pull or lift tabs (B65D17/32 takes precedence)
- B65D 5/747: {with means for piercing or cutting the container wall or a membrane connected to said wall}
- B65D 17/28: at lines or points of weakness
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

The present invention discloses a container cover produced from a plastics film, having a rotating closure which has a rotatable cylindrical cutting device (100, 300), wherein the latter has a lower rim (110) on which at least one cutting edge section (120) is arranged, and wherein said at least one cutting edge section (120) has at least three teeth (130) which are located on a line extending in an inclined manner in relation to the bag, and wherein the front-most tooth in the direction of rotation comes first into contact with the plastics film during the cutting operation. The cutting device (100, 300) is characterized in that the inclination of the line on which the teeth (130) of each cutting edge section are located is selected such that, in the case of at least approximately maximum deformation of the plastics film before the latter is perforated by the front-most tooth, at least two following teeth of the same cutting edge section (120) are in direct contact with the plastics film.

## Claims

### Claim 1

A rotatable cylindrical cutting device (100, 300) for cutting through a container covering made from plastic film having a rotating closure, wherein said cutting device has a lower rim (110) on which at least one cutting edge section (120) is located, wherein the at least one cutting edge section (120) has at least three teeth (130) which lie on a line which extends at an incline in relation to the covering, and wherein a frontmost tooth in a direction of rotation first comes into contact with the plastic film in the course of a cutting operation, characterized in that an inclination of the line on which the teeth (130) of the at least one cutting edge section lie is such that upon occurrence of at least approximately maximum deformation of the plastic film, prior to perforation thereof by the frontmost tooth, at least two subsequent teeth of the same cutting edge section (120) are in direct contact with the plastic film.

### Claim 2 (depends on 1)

The rotatable cutting device (100) as claimed in claim 1, wherein the lower rim (110) has a plurality of cutting edge sections (120), wherein each cutting edge section (120) is provided with a multiplicity of teeth (130) and is located at a distance from a recess (140).

### Claim 3 (depends on 2)

The rotatable cutting device (100) as claimed in claim 2, wherein an inclination of the line on which the teeth (130) of each cutting edge section lie is such that upon occurrence of at least approximately maximum deformation of the plastic film, prior to perforation thereof by the frontmost tooth, at least half the number of subsequent teeth of the same cutting edge section (120) are in direct contact with the plastic film.

### Claim 4 (depends on 1)

The rotatable cutting device (100) as claimed in claim 1, wherein upon occurrence of at least approximately maximum deformation of the plastic film, prior to perforation thereof by the frontmost tooth, the majority of the number of subsequent teeth of the same cutting edge section (120) are in direct contact with the plastic film.

### Claim 5 (depends on 1)

The rotatable cutting device (100) as claimed in claim 1, wherein the recess (140) is configured with a recess strip (142) tapered like a hook with a tear-off edge (144).

### Claim 6 (depends on 1)

The rotatable cutting device (100, 300) as claimed in claim 1, wherein the cutting device (100) has along a circumference a cutout (180) which measures at most half of an entire circumferential line of the cutting device (100).

### Claim 7 (depends on 1)

The rotatable cutting device (100) as claimed in claim 1, wherein the container covering (190) is composed from materials from one of the following group: plastic, paper, light metal, cardboard and multilayer laminated films made from at least two of the aforementioned materials.

### Claim 8 (depends on 7)

The rotatable cutting device (100, 300) as claimed in claim 7, wherein the container covering consists of one of the following materials: polypropylene, polyethylene and polyamide.

### Claim 9 (depends on 7)

The rotatable cutting device (100, 300) as claimed in claim 7, wherein the light metal consists of aluminum.

### Claim 10 (depends on 1)

The rotatable cutting device (300) as claimed in claim 1, wherein the teeth (130) in an assembled state form two angles with the container covering (190), wherein a first set of teeth (131) forms a flatter angle (α) with the container covering than an angle (β) of a second set of teeth (132) which is located downstream in the direction of rotation (R).

### Claim 11 (depends on 1)

A closure device which is mountable on a container covering (190) and comprises a rotatable cutting device (100) as claimed in claim 1.

### Claim 12

A container comprising a container covering made from plastic film having a rotating closure, and rotatable cylindrical cutting device (100, 300), wherein said cutting device has a lower rim (110) on which at least one cutting edge section (120) is located, wherein the at least one cutting edge section (120) has at least three teeth (130) which lie on a line which extends at an incline in relation to the covering, wherein a frontmost tooth in a direction of rotation first comes into contact with the plastic film in the course of a cutting operation, an and wherein an inclination of the line on which the teeth (130) of the at least one cutting edge section lie is such that upon occurrence of at least approximately maximum deformation of the plastic film, prior to perforation thereof by the frontmost tooth, at least two subsequent teeth of the same cutting edge section (120) are in direct contact with the plastic film.

### Claim 13 (depends on 12)

The container as claimed in claim 12, wherein the lower rim (110) has a plurality of cutting edge sections (120), wherein each cutting edge section (120) is provided with a multiplicity of teeth (130) and is located at a distance from a recess (140).

### Claim 14 (depends on 13)

The container as claimed in claim 13, wherein an inclination of the line on which the teeth (130) of each cutting edge section lie is such that upon occurrence of at least approximately maximum deformation of the plastic film, prior to perforation thereof by the frontmost tooth, at least half the number of subsequent teeth of the same cutting edge section (120) are in direct contact with the plastic film.

### Claim 15 (depends on 12)

The container as claimed in claim 12, wherein upon occurrence of at least approximately maximum deformation of the plastic film, prior to perforation thereof by the frontmost tooth, the majority of the number of subsequent teeth of the same cutting edge section (120) are in direct contact with the plastic film.

### Claim 16 (depends on 12)

The container as claimed in claim 12, wherein the recess (140) is configured with a recess strip (142) tapered like a hook with a tear-off edge (144).

### Claim 17 (depends on 12)

The container as claimed in claim 12, wherein the cutting device (100) has along a circumference a cutout (180) which measures at most half of an entire circumferential line of the cutting device (100).

### Claim 18 (depends on 12)

The container as claimed in claim 12, wherein the container covering (190) is composed from materials from one of the following group: plastic, paper, light metal, cardboard and multilayer laminated films made from at least two of the aforementioned materials.

### Claim 19 (depends on 18)

The container as claimed in claim 18, wherein the container covering consists of one of the following materials: polypropylene, polyethylene and polyamide.

### Claim 20 (depends on 18)

The container as claimed in claim 18, wherein the light metal consists of aluminum.

### Claim 21 (depends on 12)

The container as claimed in claim 12, wherein the teeth (130) in an assembled state form two angles with the container covering (190), wherein a first set of teeth (131) forms a flatter angle (α) with the container covering than an angle (β) of a second set of teeth (132) which is located downstream in the direction of rotation (R).