US3575580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable themographic duplicator mounted in a carrying case having hinged housing portions
Assignee: 3M Co
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Filing: 1970-01-29
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Granted: 1971-04-20
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Expires: 1990-01-29
Abstract
Abstract A portable duplicator in an attache case includes a heating station for subjecting copy-sheet and master to uniform heating, and a container tiltable for easy access to a supply of copying materials.
Inventors
- 👤 Glenn R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/306; G03B17/00; G03B17/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A portable duplicator comprising: a hollow case having the external appearance of an attache'' case and comprising a base and a cover hingedly attached thereto by hinge means disposed along the rearward edge thereof; a compact heater module supported on said base adjacent the forward edge and comprising an elongate transversely arcuate open-faced heater shoe, a compression roller pressing against said shoe, means for imparting uniform rotation to said roller, and casing means having input and output openings for directing papers to and from said roller and shoe; and divider strip means, supported on said base between said heater module and said hinge means, For supporting a flat covered tray means parallel to said base and against said heater station while said case is closed and at an angle to said base and against said cover while said case is open.
Claim 2
Dependent Claim
141 words
A portable duplicator comprising: a hollow case having the external appearance of an attache'' case and comprising a base and a cover hingedly attached thereto by hinge means disposed along the rearward edge thereof; a compact heater module supported on said base adjacent the forward edge and comprising an elongate transversely arcuate open-faced heater shoe, a compression roller pressing against said shoe, means for imparting uniform rotation to said roller, and casing means having input and output openings for directing papers to and from said roller and shoe; and divider strip means, supported on said base between said heater module and said hinge means, For supporting a flat covered tray means parallel to said base and against said heater station while said case is closed and at an angle to said base and against said cover while said case is open.
Claim 3
Dependent Claim
31 words
The duplicator of claim 1 wherein said heater shoe is resiliently biased against said roller by spring means contacting a single central contact area on the outer surface of said shoe.
Claim 4
Dependent Claim
34 words
The duplicator of claim 1 wherein said output opening is partially defined by an arcuate reversely folded segment of said casing and, as an extension thereof, spring-wire paper-stripping means for contacting said compression roller.
References Cited (Backward Citations)
US3251994A
Cited
US3467470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |