US4315047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curled tape, roll, and container end
Assignee: 3M Co
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Filing: 1980-09-19
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Granted: 1982-02-09
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Expires: 2000-09-19
Abstract
Abstract Adhesive tapes which exhibit curl as the result of deformation of the backings of the tapes are described. The tapes may exhibit various curls including transverse and longitudinal curls and are particularly suitable for sealing preformed openings in container ends without concomitant entrapment of air between a given tape segment and the container end.
Inventors
- 👤 Thomas W. Seabold
- 👤 Richard A. Patterson
- 👤 Richard P. DE Neui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:08
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/21; Y10T428/214; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24479; Y10T428/2457; Y10T428/28; Y10T428/2804; Y10T428/2852; Y10T428/2857
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
33 words
A tape comprising a backing and a pressure-sensitive adhesive layer wherein said backing of said tape is deformed in uniformly spaced, localized areas to impart at least a temporary curl to said tape.
Claim 2
Dependent Claim
33 words
A tape comprising a backing and a pressure-sensitive adhesive layer wherein said backing of said tape is deformed in uniformly spaced, localized areas to impart at least a temporary curl to said tape.
Claim 3
Dependent Claim
20 words
A tape in accordance with claim 1 wherein said backing of said tape is deformed in uniformly spaced, localized areas.
Claim 4
Dependent Claim
13 words
A tape in accordance with claim 1 wherein said tape exhibits transverse curl.
Claim 5
Dependent Claim
13 words
A tape in accordance with claim 1 wherein said tape exhibits longitudinal curl.
Claim 6
Dependent Claim
15 words
A tape in accordance with claim 1 wherein said localized areas of deformation are discontinuous.
Claim 7
Dependent Claim
20 words
A tape in accordance with claim 1 wherein said backing is selected from the group consisting of metals and plastics.
Claim 8
Dependent Claim
65 words
A tape in accordance with claim 1 wherein said backing of said tape is selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate, polytetramethylene terephthalate, polycarbonate, 6-6 nylon, physical blends of polytetramethylene terephthalate/polyethylene, physical blends of polytetramethylene terephthalate/polyethylene terephthalate, physical blends of polytetramethylene terephthalate/phenoxy, glycol modified polyethylene terephthalate, unplasticized polyvinylchloride, polyethylene terephthalate/polyethylene composites, and graft copolymers comprising acrylonitrile/methylmethacrylate copolymer grafted onto acrylonitrile/butadiene copolymer backbone.
Claim 9
Dependent Claim
25 words
A tape in accordance with claim 1 wherein said backing comprises polyethylene terephthalate and said adhesive layer comprises styrene/butadiene copolymer blended with an alpha-pinene resin.
Claim 10
Dependent Claim
19 words
A tape in accordance with claim 8 wherein said backing is from about 1 to 10 mils in thickness.
Claim 11
Dependent Claim
22 words
A tape in accordance with claim 1, wherein the surface of said backing opposite said adhesive is coated with a silicone backsize.
Claim 12
Dependent Claim
24 words
An article of manufacture comprising a container end having at least one preformed opening, said preformed opening sealed with the tape of claim 1.
Claim 13
Dependent Claim
22 words
A convolutely wound roll of the tape of claim 1, wherein said adhesive layer is exposed on the outside of said roll.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |