Patent US3634994A successfully refreshed from Google Patents.
US3634994A
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US
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Method of manufacturing envelopes containing free inserts
Assignee: Wiggins Teaper Ireland Ltd
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Filing: 1968-03-26
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Granted: 1972-01-18
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Expires: 1988-03-26
Abstract
Abstract Envelopes containing free or substantially free inserts are manufactured on conventional envelope machines by applying a disintegrating adhesive between the blank and insert to hold the insert in position on the blank while the blank is driven through the machine and envelope forming flaps are folded therearound. The envelope containing the insert may be manufactured with the seal flap either open or sealed and with or without a window opening to expose the insert.
Inventors
- 👤 Edward A Dunne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:57
CPC Classifications
B; B31; B31B; B31B70/00; B43; B43M; B43M3/00; B31B2150/00; B31B2160/00; B31B2160/10; B31B2170/00; B31B2170/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
The method of producing envelopes containing free inserts by operating upon envelope blanks in an envelope making machine of the type having a window patch section including a gum-receiving receptacle and gum applicators cooperating with said receptacle, and patch applicators for applying window patches on said blanks, comprising the steps of: a. charging said receptacle with a substantially completely disintegrating adhesive of a type wherein the application of heat thereto promotes disintegration thereof, b. charging said window patch section with inserts to be loosely contained in said envelopes, c. applying said disintegrating adhesive between said blanks and inserts in said window patch section and causing contact between said blanks and inserts producing a temporary connection therebetween, d. applying heat to said temporary adhesive connection before folding to promote the disintegration thereof, and e. folding said blanks after applying said heat and prior to the complete disintegration of said adhesive connection, thereby forming envelopes around said inserts, said inserts becoming substantially free within said envelopes following said folding.
Claim 2
Independent Claim
167 words
The method of producing envelopes containing free inserts by operating upon envelope blanks in an envelope making machine of the type having a window patch section including a gum-receiving receptacle and gum applicators cooperating with said receptacle, and patch applicators for applying window patches on said blanks, comprising the steps of: a. charging said receptacle with a substantially completely disintegrating adhesive of a type wherein the application of heat thereto promotes disintegration thereof, b. charging said window patch section with inserts to be loosely contained in said envelopes, c. applying said disintegrating adhesive between said blanks and inserts in said window patch section and causing contact between said blanks and inserts producing a temporary connection therebetween, d. applying heat to said temporary adhesive connection before folding to promote the disintegration thereof, and e. folding said blanks after applying said heat and prior to the complete disintegration of said adhesive connection, thereby forming envelopes around said inserts, said inserts becoming substantially free within said envelopes following said folding.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |