Patent US4175878A successfully refreshed from Google Patents.
US4175878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printer cover assembly
Assignee: International Business Machines Corp
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Filing: 1977-04-12
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Granted: 1979-11-27
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Expires: 1997-04-12
Abstract
Abstract A cover structure is disclosed which is particularly adapted to a printer having a continuous forms tractor, as including two principal portions mounted on a base which are removable to the front and rear without disturbing the printer platen, the forms tractor or the paper supply resident in the forms tractor and the paper handling portion of the printer mechanism.
Inventors
- 👤 James W. Wing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:27
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
218 words
A printer having a print mechanism, a roller platen and a continuous form paper tractor for moving a continuous paper web over said platen comprising a base member which is connected to and supports said print mechanism; a cover assembly that shrouds at least a portion of said print mechanism; said cover assembly having front and rear sections supported on said base member and abutting one another along an interface surface; slotted opening means formed in said cover assembly extending from said interface surface; support means carried by said paper tractor which extend through said slotted opening means and are connected to said print mechanism whereby said paper tractor is supported exterior of said cover assembly sections; releaseable retaining means for securing said cover assembly front section and said cover assembly rear section to said base member; said front section being removeable from said base member in a forward direction, upon release of said releaseable retaining means, without removal or disassembly of said paper tractor and said rear section being removeable from said base member in a rearward direction, upon release of said releaseable retaining means, without removal or disassembly of said paper tractor; whereby said cover assembly can be removed from said base member to expose said print mechanism without removal or disassembly of said paper tractor.
Claim 2
Dependent Claim
218 words
A printer having a print mechanism, a roller platen and a continuous form paper tractor for moving a continuous paper web over said platen comprising a base member which is connected to and supports said print mechanism; a cover assembly that shrouds at least a portion of said print mechanism; said cover assembly having front and rear sections supported on said base member and abutting one another along an interface surface; slotted opening means formed in said cover assembly extending from said interface surface; support means carried by said paper tractor which extend through said slotted opening means and are connected to said print mechanism whereby said paper tractor is supported exterior of said cover assembly sections; releaseable retaining means for securing said cover assembly front section and said cover assembly rear section to said base member; said front section being removeable from said base member in a forward direction, upon release of said releaseable retaining means, without removal or disassembly of said paper tractor and said rear section being removeable from said base member in a rearward direction, upon release of said releaseable retaining means, without removal or disassembly of said paper tractor; whereby said cover assembly can be removed from said base member to expose said print mechanism without removal or disassembly of said paper tractor.
Claim 3
Dependent Claim
34 words
The printer of claim 1 further comprising interlock means for preventing removal of one of said cover assembly sections when the other of said cover assembly sections is releaseably secured to said base member.
Claim 4
Dependent Claim
43 words
The printer of claim 2 wherein said interlock means includes a lost motion connection means for limiting motion of said one of said cover assembly sections in the direction of removal when said other of said sections is releaseably secured to said base.
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) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |