US4023829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt adhesive dot binding
Assignee: General Binding Corp
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Filing: 1975-03-17
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Granted: 1977-05-17
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Expires: 1995-03-17
Abstract
Abstract A method and apparatus for permanently binding sheets of paper into a cover inexpensively and quickly is disclosed. Hot melt adhesive dots are placed near a center fold on one inside surface of a cover in alignment with pre-punched holes in paper sheets to be bound. An opposite surface of the cover is folded over and upon the dots and heat is applied causing a top of each dot to adhere to the adjacent cover surface, thus locking the paper sheets to the cover adjacent the center fold.
Inventors
- 👤 Henry N. Staats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:47
CPC Classifications
B; B42; B42D; B42D3/00; B42D3/002; B42C; B42C9/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
A method of securing sheets with a prepunched hole pattern to a cover having first and second leaves folded together comprising the steps of: a. depositing hot melt units having a convex-shaped upper surface into adhesive contact with said first leaf according to said hole pattern, said units projecting upwardly substantially above said first leaf; b. positioning said sheets on said first leaf with said prepunched holes in alignment with and surrounding said adhesive units, the diameter of said holes being larger than the largest diameter of said hot melt units; c. folding said second leaf over into contact with tops of the convex-shaped upper surfaces of said adhesive units, said convex tops extending above said prepunched holes; and d. heating said tops to flatten said convex tops to form an adhesive contact between said flattened tops of the adhesive units and said second leaf.
Claim 2
Independent Claim
145 words
A method of securing sheets with a prepunched hole pattern to a cover having first and second leaves folded together comprising the steps of: a. depositing hot melt units having a convex-shaped upper surface into adhesive contact with said first leaf according to said hole pattern, said units projecting upwardly substantially above said first leaf; b. positioning said sheets on said first leaf with said prepunched holes in alignment with and surrounding said adhesive units, the diameter of said holes being larger than the largest diameter of said hot melt units; c. folding said second leaf over into contact with tops of the convex-shaped upper surfaces of said adhesive units, said convex tops extending above said prepunched holes; and d. heating said tops to flatten said convex tops to form an adhesive contact between said flattened tops of the adhesive units and said second leaf.
Claim 3
Dependent Claim
47 words
The method of claim 7 wherein the step of folding includes the steps of bending at a center score and at first and second scores on said first and second leaves, respectively, to promote folding together of said first and second leaves without stressing said adhesive contacts.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |