Patent US3327063A successfully refreshed from Google Patents.
US4354890A
Expired / Lapsed
US
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Method of producing reinforced paper
Assignee: BOWATER TUTT INDUSTRIES PTY Ltd A CORP OF VICTORIA
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Filing: 1981-03-23
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Granted: 1982-10-19
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Expires: 2001-03-23
Abstract
Abstract The method of producing sheets of reinforced paper comprising printing a hot-melt adhesive at pre-selected positions onto the surface of a continuously moving web of paper. The method also includes cooling the adhesive and cutting and trimming the web into sheets of paper, the adhesive forming the reinforcement at desired positions on the paper. The hot-melt adhesive is preferably a linearic copolyester such as GRILESTA 6505 (GRILESTA is a Registered Trade Mark).
Inventors
- 👤 Peter M. Maffey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:51
CPC Classifications
B; B42; B42F; B42F3/00; B42F3/003; B42F3/006; B41; B41M; B41M3/00; B41M3/006; B31; B31B; B31B50/00; B31B50/60; B31B50/62; B31B50/622; B31B50/74; B31B50/742; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
A method of producing sheets of reinforced paper comprising printing a hot-melt adhesive onto the surface of a continuously moving web of paper in a configuration comprising two annuli of reinforcement joined by a neck portion, cooling the adhesive, cutting the web across the neck portion, and trimming the web into sheets of paper.
Claim 2
Independent Claim
54 words
A method of producing sheets of reinforced paper comprising printing a hot-melt adhesive onto the surface of a continuously moving web of paper in a configuration comprising two annuli of reinforcement joined by a neck portion, cooling the adhesive, cutting the web across the neck portion, and trimming the web into sheets of paper.
Claim 3
Dependent Claim
25 words
The method of claim 1 comprising punching holes into the web of the paper at positions where the paper has been coated with hot-melt adhesive.
Claim 4
Dependent Claim
17 words
The method according to claim 1 wherein the hot-melt adhesive is a linearic copolyester in liquid form.
Claim 5
Dependent Claim
35 words
The method according to claim 1 comprising an additional step of reblocking the sheets of paper and securing the sheets together by heating the edges of the sheets adjacent the reinforcement to melt the adhesive.
Claim 6
Dependent Claim
30 words
The method according to claim 1 comprising cutting the web so that each sheet has an annulus of reinforcement adjacent one edge, but spaced therefrom by half the neck portion.
Claim 7
Dependent Claim
18 words
The method according to claim 3 wherein said linearic copolyester is heated to a temperature above 130° C.
Claim 8
Dependent Claim
12 words
A reinforced sheet of paper manufactured by the method of claim 1.
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) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |