US3669019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual purpose hectographic master unit
Assignee: Eaton Allen Corp
•
Filing: 1969-11-03
•
Granted: 1972-06-13
•
Expires: 1989-11-03
Abstract
Abstract A master unit for hectographic duplication comprising a folder including a top sheet joined to a bottom sheet forming a file. A transfer sheet is reversibly disposed between the top sheet and the bottom sheet and has a coating on one side thereof of a pressure and heat sensitive pigmented transfer material. The top sheet is of a relatively light weight heat transferable paper for receiving a thermographically reproduced hectographic mirror image thereon. The bottom sheet is a relatively heavy weight paper for receiving a pressure reproduced hectographic mirror image of pressure formed markings on the bottom sheet.
Inventors
- 👤 Victor Barouh
- 👤 Robert Glenn
- 👤 Louis Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:02
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/025; B41M5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
A master unit for hectographic duplication comprising a folder including top sheet means and bottom sheet means, means joining one edge of said top sheet means to one edge of said bottom sheet means for enabling the changing of relative position inside out and for enabling the insertion into and removal from the space between said top sheet means and said bottom sheet means, said top sheet means being detachable from said bottom sheet means, a transfer sheet of a transparent fluid nonabsorbent material reversibly disposed between said top sheet means and said bottom sheet means, said transfer sheet having a coating on one side thereof of pressure and heat sensitive pigmented transfer material, said top sheet means being a relatively light weight, relatively heat transferable paper for receiving a thermographically reproduced hectographic mirror image of a copy sheet when said coating on said transfer sheet faces said top sheet means, said bottom sheet means being a relatively heavy weight paper for receiving a pressure reproduced hectographic mirror image of pressure formed markings on said bottom sheet when said coating on said transfer sheet faces said bottom sheet means, and an interleaving tissue sheet removably disposed adjacent said pigmented transfer sheet between said folder and said transfer sheet.
Claim 2
Dependent Claim
208 words
A master unit for hectographic duplication comprising a folder including top sheet means and bottom sheet means, means joining one edge of said top sheet means to one edge of said bottom sheet means for enabling the changing of relative position inside out and for enabling the insertion into and removal from the space between said top sheet means and said bottom sheet means, said top sheet means being detachable from said bottom sheet means, a transfer sheet of a transparent fluid nonabsorbent material reversibly disposed between said top sheet means and said bottom sheet means, said transfer sheet having a coating on one side thereof of pressure and heat sensitive pigmented transfer material, said top sheet means being a relatively light weight, relatively heat transferable paper for receiving a thermographically reproduced hectographic mirror image of a copy sheet when said coating on said transfer sheet faces said top sheet means, said bottom sheet means being a relatively heavy weight paper for receiving a pressure reproduced hectographic mirror image of pressure formed markings on said bottom sheet when said coating on said transfer sheet faces said bottom sheet means, and an interleaving tissue sheet removably disposed adjacent said pigmented transfer sheet between said folder and said transfer sheet.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |