# US 10,246,224 B2 · Plastic bags, rolls of plastic bags, and tubular blown film processes of making the same

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- Number: US 10,246,224 B2
- Document ID: US10246224B2
- Status: Granted
- Kind: B2
- Application number: 15/265,907
- Filed: 2016-09-15
- Published: 2017-01-05
- Granted: 2019-04-02
- Earliest claimed: 2013-06-03
- Assignees: S. C. Johnson & Son, Inc.
- Applicants: S.C. Johnson & Son, Inc.
- Inventors: Brian C. Dais; Jose Porchia; Juan M. Garces
- Web page: https://patentgrep.com/patent/US10246224B2

## CPC

- B31B 70/146: {using tools mounted on a drum}
- B26F 1/00: Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor (perforating by laser beam B23K26/00; subjecting the grinding tools or the abrading medium to vibration, e.g. grinding with ultrasonic frequency, B24B1/04; perforating by sand-blasting B24C; punching cards or tapes for statistical and record purposes G06K1/00)
- B26F 1/18: Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
- B29C 39/12: Making multilayered or multicoloured articles {(B29C39/021 takes precedence)}
- B29C 48/0018: {combined with shaping by orienting, stretching or shrinking, e.g. film blowing (B29C48/0017 takes precedence)}
- B29C 48/0021: {combined with joining, lining or laminating}
- B29C 48/0022: {combined with cutting}
- B29C 48/10: flexible, e.g. blown foils
- B29C 65/08: using ultrasonic vibrations {(non-plastics element to plastics elements B29C65/645)}
- B29C 65/16: Laser beams
- B29C 65/48: using adhesives {, i.e. using supplementary joining material; solvent bonding}
- B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)}
- B29C 66/4312: {for making flat seams in tubular or hollow articles, e.g. transversal seams}
- B29C 66/8322: {Joining or pressing tools reciprocating along one axis}
- B29C 66/8511: {Bag making machines}
- B31B 70/00: Making flexible containers, e.g. envelopes or bags
- B65D 33/002: {Rolls, strips or like assemblies of bags}
- B65D 33/007: {for facilitating the separation of the two walls, e.g. walls of inequal height, tabs; for maintaining the mouth of the sack or bag open}
- B29C 48/0019: {combined with shaping by flattening, folding or bending}
- B29C 55/28: of blown tubular films, e.g. by inflation {(extrusion moulding of tubular films B29C48/03)}
- B29C 65/18: using heated tools
- B29C 65/22: Heated wire {resistive ribbon, resistive band or resistive strip (electrical insulating support therefor B29C66/81871)}
- B29C 65/482: {Drying adhesives, e.g. solvent based adhesives}
- B29C 65/58: Snap connection
- B29C 65/76: Making non-permanent or releasable joints
- B29C 66/71: {characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125)}
- B29C 2793/0045: Perforating
- B29K 2023/00: Use of polyalkenes {or derivatives thereof} as moulding material
- B29L 2023/001: {Tubular films, sleeves}
- B31B 70/16: Cutting webs
- B31B 70/62: by adhesives
- B31B 70/645: {Making seals transversally to the direction of movement}
- B31B 70/8131: {Making bags having interengaging closure elements}
- B31B 2155/003: {starting from tubular webs}
- B31B 2170/00: Construction of flexible containers
- B31B 2170/10: interconnected
- Y10T 156/1054: and simultaneously bonding [e.g., cut-seaming]
- 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)
- B26F: PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING (marking-out, perforating or making buttonholes A41H25/00; shoemaking A43D; surgery A61B; punching metal B21D; drilling metal B23B; cutting of metal by applying heat locally, e.g. flame cutting, B23K; cutting by abrasive fluid jets B24C5/02; details common to machines for severing B26D; drilling wood B27C; drilling stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; of glass C03B; of leather C14B; of textile materials D06H; for light guides G02B6/25; of tickets G07B)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- 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
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A process of manufacturing a roll of plastic bags. The process includes forming a tubular blown film, and collapsing the tubular blown film so that the tubular blown film includes a first side, a second side, a first edge, and a second edge. Openings are cut in the collapsed tubular blown film, and sealing closure mechanisms are inserted through the openings into the collapsed tubular blown film. The sealing closure mechanisms are then fixed to the collapsed tubular blown film.

## Claims

### Claim 1

A process of manufacturing a roll of plastic bags, the process comprising:
forming a tubular blown film;
collapsing the tubular blown film so that the tubular blown film includes a first side, a second side, a first edge, and a second edge;
perforating the first side of the collapsed tubular blown film to form a plurality of perforation lines;
perforating the second side of the collapsed tubular blown film to form a plurality of perforation lines;
cutting openings in the collapsed tubular blown film, each opening being provided at a position adjacent to one of the plurality of perforation lines;
inserting sealing closure mechanisms through the openings into the collapsed tubular blown film;
fixing the sealing closure mechanisms to the collapsed tubular blown film;
connecting the first and second sides of the collapsed tubular blown film to form a plurality of seals, each seal of the plurality of seals extending from the first edge of the collapsed tubular blown film to the second edge of the collapsed tubular blown film; and
winding the collapsed tubular blown film into a roll.

### Claim 2 (depends on 1)

A process according to claim 1, wherein each of the sealing closure mechanisms includes a pair of interlocking members.

### Claim 3 (depends on 1)

A process according to claim 1, wherein each of the sealing closure mechanisms is provided as two parts, with one of the parts being fixed to the first side of the collapsed tubular blown film, and the other of the parts being fixed to the second side of the collapsed tubular blown film.

### Claim 4 (depends on 1)

A process according to claim 1, wherein heat sealing is used to fix the sealing closure mechanisms to the collapsed tubular blown film.

### Claim 5 (depends on 1)

A process according to claim 1, wherein each of the perforation lines of the plurality of perforation lines in the first side of the collapsed tubular blown film is offset from a perforation line of the plurality of perforation lines in the second side of the collapsed tubular blown film.

### Claim 6 (depends on 1)

A process according to claim 1, wherein each of the perforation lines of the plurality of perforation lines in the first side of the collapsed tubular blown film extends from the first edge to the second edge in one of a sinusoidal pattern, a repeating square shape, a repeating triangular shape, and a repeating saw tooth shape.

### Claim 7 (depends on 6)

A process according to claim 6, wherein each of the perforation lines of the plurality of perforation lines in the second side of the collapsed tubular blown film extends from the first edge to the second edge in substantially straight lines.

### Claim 8 (depends on 1)

A process according to claim 1, further comprising inserting a mandrel in a center of the collapsed tubular blown film so that the perforations formed on each side are not imparted to the other side when the first side of the collapsed tubular blown film is perforated to form the plurality of perforation lines in the first side and when the second side of the collapsed tubular blown film is perforated to form the plurality of perforation lines in the second side.

### Claim 9 (depends on 1)

A process according to claim 1, wherein the pluralities of perforation lines in the first and second sides of the collapsed tubular blown film are formed using one of a die and punch, a laser, and needles.

### Claim 10 (depends on 1)

A process according to claim 1, wherein the plurality of seals is formed using one of a heated wire, a heated bar, a heated knife, ultrasonic welding, laser welding, a solvent, and adhesive bonding.

### Claim 11 (depends on 1)

A process according to claim 1, wherein the pluralities of perforation lines are formed in the first and second sides of the collapsed tubular blown film before the plurality of seals is formed in the collapsed tubular blown film.

### Claim 12 (depends on 1)

A process according to claim 1, wherein the plurality of seals is formed in the collapsed tubular blown film before the pluralities of perforation lines are formed in the first and second sides of the collapsed tubular blown film.