Patent US3747820A successfully refreshed from Google Patents.
US3747820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forms feeding device
Assignee: International Business Machines Corp
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Filing: 1971-11-17
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Granted: 1973-07-24
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Expires: 1991-11-17
Abstract
Abstract An inexpensive and efficient forms feeding device for a printer utilizes a pair of independent sprocket feed wheels which are quickly adjustable to almost any width form and which are driven from a common drive shaft.
Inventors
- 👤 J Hawxhurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:32
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/26; B41J11/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
In a forms feeding device a support shaft, a pair of sprocket wheels rotatably and slidably mounted on said support shaft and having means including releasable clamp means operatively connected to said sprocket wheels to clamp said sprocket wheels at different selected positions along said support shaft; a drive shaft disposed in spaced relation with said support shaft, and a carrier plate slidably mounted on said shafts having rotatable drive means secured thereto and connected in driving relation with said drive shaft and with one of said sprocket wheels.
Claim 2
Dependent Claim
89 words
In a forms feeding device a support shaft, a pair of sprocket wheels rotatably and slidably mounted on said support shaft and having means including releasable clamp means operatively connected to said sprocket wheels to clamp said sprocket wheels at different selected positions along said support shaft; a drive shaft disposed in spaced relation with said support shaft, and a carrier plate slidably mounted on said shafts having rotatable drive means secured thereto and connected in driving relation with said drive shaft and with one of said sprocket wheels.
Claim 3
Dependent Claim
56 words
The invention as defined in claim 1, characterized by said sprocket wheel including gear teeth formed thereon adjacent one edge of said sprocket wheel and said drive means including at least one drive gear connected in driving relation with said gear teeth on said sprocket wheel, and having a sliding drive fit with said drive shaft.
Claim 4
Dependent Claim
31 words
The invention as defined in claim 2, characterized by said sprocket wheel having a relatively wide surface portion adjacent one edge providing support for forms being fed by said sprocket wheel.
Claim 5
Dependent Claim
30 words
The invention as defined in claim 3, characterized by a hinged cover partially enclosing and cooperative with said sprocket wheel spring biased to maintain a form against said sprocket wheel.
Claim 6
Dependent Claim
18 words
The invention as defined in claim 4, characterized by said cover being pivotally connected with said carrier plate.
Claim 7
Dependent Claim
34 words
The invention as defined in claim 5, characterized by a rotatable pressure roll mounted on said cover to maintain a form in driving engagement with said relatively wide surface portion of said sprocket wheel.
Claim 8
Dependent Claim
33 words
The invention as defined in claim 5, characterized by a plurality of wheel members slidably disposed on said support shaft between said sprocket wheels to support forms being fed by said sprocket wheels.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |