# US 7,048,224 B2 · Wave-cut overlapping trash bags

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- Number: US 7,048,224 B2
- Document ID: US7048224B2
- Status: Granted
- Kind: B2
- Application number: 10/644,326
- Filed: 2003-08-20
- Published: 2005-02-24
- Granted: 2006-05-23
- Earliest claimed: 2003-08-20
- Assignees: Olympic General Corporation
- Inventors: Charles D. Allgood
- Web page: https://patentgrep.com/patent/US7048224B2

## CPC

- B65H 29/6627: {in combination with auxiliary means for overlapping articles}
- B65D 33/002: {Rolls, strips or like assemblies of bags}
- B65D 33/1608: {Integral flaps for tying above the bag}
- B65H 29/006: {Winding articles into rolls}
- B65H 35/10: from or with devices for breaking partially-cut or perforated webs, e.g. bursters
- B31B 70/14: Cutting, e.g. perforating, punching, slitting or trimming (cutting window openings B31B70/83)
- B31B 70/266: {involving gusset-forming}
- B31B 70/36: by continuously feeding them to stationary members, e.g. plates, ploughs or cores
- B31B 70/942: {by winding up}
- B31B 70/946: {the bags being interconnected}
- B31B 70/96: in an overlapping arrangement
- B31B 2155/00: Flexible containers made from webs
- B31B 2155/003: {starting from tubular webs}
- B31B 2160/10: rectangular and flat, i.e. without structural provision for thickness of contents
- B65H 2301/4192: for handling articles of limited length in shingled formation
- B65H 2701/191: Bags, sachets and pouches or the like
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- 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
- B31B: MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making wound articles, e.g. wound tubes, B31C; combined making and filling B65B)

## Abstract

A process for assembling wave-cut trash bags for overlapping dispensing includes the steps of providing a flattened blown-film polymeric tube; providing sets of closely spaced, parallel seals extending across the entire width of the flattened blown-film polymeric tube at periodic intervals there along; providing a transversely extending line of perforations between the seals comprising each set of closely spaced, parallel seals; and providing a wave shaped line of perforations extending transversely across the entire width of the flattened blown-film polymeric tube at a location equidistance between adjacent closely spaced, parallel sets of seals. The flattened blown-film polymeric tube is separated along each transversely extending line of perforations and along each wave shaped line of perforations after which the leading end of each following trash bag is positioned in an overlapping relationship with the trailing end of the preceding trash bag to facilitate overlapping dispensing.

## Claims

### Claim 1

A process for assembling wave-cut trash bags for overlapping dispensing including the steps of:
providing a flattened blown-film polymeric tube;
providing sets of closely spaced, parallel seals extending transversely across the entire width of the flattened blown-film polymeric tube at equally spaced intervals therealong;
providing a line of perforations extending transversely across the entire width of the flattened blown-film polymeric tube between the closely spaced, parallel seals comprising each set thereof;
providing a wave shaped line of perforations extending across the entire width of the flattened blown-film polymeric tube at a location equidistant from each of the closely spaced, parallel sets of seals;
folding the flattened blown-film polymeric tube axially into a multi-layer, fractional width configuration;
positioning a signal receiving target between the layers of the folded flattened blown-film polymeric tube;
directing a signal through the transversely extending line of perforations positioned between the closely spaced, parallel seals and through the perforations comprising the wave-cut line of perforations and thereby locating each end of each trash bag comprising the flattened blown-film polymeric tube;
applying opposed axially directing forces to the flattened blown-film polymeric tube and thereby separating the trash bags comprising the flattened blown-film polymeric tube at each of the transversely extending line of perforations positioned between the closely spaced, parallel seals;
following the separation step, positioning the leading sealed end of the following trash bag comprising the flattened blown-film polymeric tube in an overlapping relationship with the trailing sealed end of the preceding trash bag comprising the flattened blown-film polymeric tube;
applying opposed axially directing forces to the flattened blown-film polymeric tube and thereby separating the trash bags comprising the flattened blown-film polymeric tube along each wave shaped line of perforations formed therein;
following the separating step positioning the leading wave-cut end of the following trash bag comprising the flattened blown-film polymeric tube in an overlapping relationship with the wave-cut trailing end of the preceding trash bag comprising the flattened blown-film polymeric tube; and
rolling the trash bags comprising the flattened blown-film polymeric tube into a roll with the sealed end of each following trash bag in the roll overlapping the sealed end of each preceding trash bag in the roll and with the wave-cut open end of each following trash bag in the roll overlapping the wave-cut open end of the preceding trash bag in the roll.

### Claim 2 (depends on 1)

The roll of trash bags constructed in accordance with claim 1.

### Claim 3 (depends on 1)

The process according to claim 1 wherein the step of directing a signal through the perforations formed in the flattened blown-film polymeric tube is carried out by directing an electromagnetic beam through the perforations formed in the flattened blown-film polymeric tube.

### Claim 4 (depends on 1)

The process according to claim 1 wherein the step of directing a signal through the perforation formed in the flattened blown-film polymeric tube is carried out by directing an electric spark through the perforations formed in the flattened blown-film tube.

### Claim 5 (depends on 1)

The process according to claim 1 wherein the wave shaped lines of perforations which are formed in the flattened blown-film polymeric tube to define the open ends of the trash bags comprising the flattened blown-film polymeric tube are arranged in accordance with a predetermined pattern which eliminates force concentrations when the opposed axially directed forces are applied to the flattened blown-film polymeric tube to separate the trash bags comprising the flattened blown-film polymeric tube along the wave shaped lines of perforations formed therein.

### Claim 6 (depends on 1)

The process according to claim 1 is further characterized by applying a predetermined electrostatic charge to the wave-cut ends of the trash bag comprising the flattened blown-film polymeric tube prior to the step of positioning the leading wave-cut end of the following trash bag in an overlapping relationship to the trailing wave-cut end of the preceding trash bag comprising the flattened blown-film polymeric tube.