US3620874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing tear-strips
Assignee: Molins Machine Co Ltd
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Filing: 1969-06-17
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Granted: 1971-11-16
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Expires: 1989-06-17
Abstract
Abstract A method for producing tear-strips from a continuous web having a width equal to the desired length of tear-strip comprises intermittently advancing the longitudinal web, transversely cutting the web progressively from one edge to the opposite edge between each advancement of the web to sever portions of the web equal in length to the desired width of the tear-strip and continuously urging each strip as it is being severed from the web in a direction transverse to the direction of advance of the web and conveying each cut strip in a direction opposite to the direction the web is progressively cut.
Inventors
- 👤 Derek Henry Youngman
- 👤 Robert William Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:33
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/14; B26D1/20; B26D1/205; B26D1/04; B31; B31B; B31B50/00; B31B50/74; B31B50/81; B31B50/812; B31B50/8125; B31B50/8126; B31B50/8129; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075; Y10T156/1077
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
A method of applying a succession of tear-strips to a continuous web of wrapping material comprising the method for producing tear-strips as claimed in claim 6 and feeding a continuous web of wrapper material to a position to receive said conveyed tear-strips in succession.
Claim 2
Dependent Claim
22 words
A method as claimed in claim 2 wherein a band of adhesive is applied to the wrapper web before receiving said tear-strips.
Claim 3
Dependent Claim
43 words
A method as claimed in claim 6 wherein each strip is continuously urged as it is being cut from said web in a direction transverse to the direction of advance of said web by directing an airstream against the surface of each strip.
Claim 4
Dependent Claim
17 words
A method as claimed in claim 2 wherein said wrapper web is heated after receiving the tear-strips.
References Cited (Backward Citations)
US2759618A
Cited
US2865261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |