US4087577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scrim reinforced plastic film
Assignee: Colgate Palmolive Co
•
Filing: 1976-12-02
•
Granted: 1978-05-02
•
Expires: 1996-12-02
Abstract
Abstract Process for forming a scrim-reinforced film wherein a molten, film-forming plastic, such as polyethylene, in a high state of fluidity is fed onto an unsupported scrim and solidified by cooling to produce a scrim at least substantially completely enclosed and surrounded by the plastic. The film, thus produced, can be formed into a high strength bag container by a folding and cutting operation utilizing hot knife means capable of fusing and thus sealing the plastic. In a preferred embodiment, the plastic is extruded onto the scrim and is subsequently heat shrunk to cause the scrim fibers to buckle and give the appearance and feel as well as the strength of a reinforced material.
Inventors
- 👤 Thomas C. Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:48
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; B32B27/32; B65; B65D; B65D33/00; B65D33/02; B65D65/00; B65D65/38; B32B2262/00; B32B2262/02; B32B2305/00; B32B2305/08; B32B2323/00; B32B2323/04; B32B2439/00; B32B2439/02; B32B2439/06; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/24099; Y10T428/26; Y10T428/266; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/172
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
A reinforced plastic sheet material comprising a scrim which includes two sets of angularly disposed strands that intersect at points of intersection each set comprising a plurality of uniformly spaced strands, and a continuous film of plastic material covering both sides of said strands and extending between said strands, said plastic material completely enclosing and surrounding said scrim said plastic material having substantially greater heat shrinking properties than said scrim to result in a plurality of said strands being buckled between the points of intersection of said intersecting strands and providing said material with a rough, nubby surface that is both visually and tactilely discernible.
Claim 2
Dependent Claim
105 words
A reinforced plastic sheet material comprising a scrim which includes two sets of angularly disposed strands that intersect at points of intersection each set comprising a plurality of uniformly spaced strands, and a continuous film of plastic material covering both sides of said strands and extending between said strands, said plastic material completely enclosing and surrounding said scrim said plastic material having substantially greater heat shrinking properties than said scrim to result in a plurality of said strands being buckled between the points of intersection of said intersecting strands and providing said material with a rough, nubby surface that is both visually and tactilely discernible.
Claim 3
Dependent Claim
19 words
Plastic sheet material according to claim 1 wherein said strands are from about 1 to about 20 mils thick.
Claim 4
Dependent Claim
15 words
Plastic sheet material according to claim 1 wherein said sets of strands are perpendicularly disposed.
Claim 5
Dependent Claim
16 words
Plastic sheet material according to claim 1 wherein said plastic film material comprises thermoplastic, film-forming polymer.
Claim 6
Dependent Claim
12 words
Plastic sheet material according to claim 4 wherein said polymer comprises polyethylene.
Claim 7
Dependent Claim
41 words
Plastic sheet material according to claim 4 wherein said plastic film material is heat shrinkable in only one direction and said scrim fibers parallel to said direction are buckled and said scrim fibers transverse to said one direction are not buckled.
References Cited (Backward Citations)
US2281635A
Cited
US2742391A
Cited
US3058863A
Cited
US3310453A
Cited
US3214320A
Cited
US3222237A
Cited
US3444024A
Cited
US3535180A
Cited
US3616130A
Cited
US3762983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |