US3572601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web feed system suitable for use in high-speed printers
Assignee: Ricoh Printing Systems America Inc
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Filing: 1969-04-14
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Granted: 1971-03-30
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Expires: 1989-04-14
Abstract
Abstract A web feed system suitable for feeding multipart paper in highspeed printers. The system utilizes a driving roller and a driven roller which together pull paper from a supply roll mounted in a paper supply buffer system. The ends of the driving and driven rollers are enlarged so that a driving force can be coupled directly therebetween rather than through the paper passing between the rollers. Reverse spiral grooves are formed in the roller surfaces to properly center and horizontally tension the paper as well as cause perfect tracking. The paper supply buffer system provides a means of supplying paper from a large roll without imposing the massive inertia of the roll into the paperdriving system.
Inventors
- 👤 Richard H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:05
CPC Classifications
B; B41; B41J; B41J15/00; B41J15/04; B41J15/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
A web feed system suitable for use in a high-speed printer, said system comprising: a web supply roll; means mounting said supply roll for rotation; first and second substantially cylindrical rollers; means mounting said rollers for rotation parallel to one another and spaced from one anothEr by a distance no greater than the thickness of said web whereby the surfaces of said rollers will frictionally engage opposite surfaces of a web passing therebetween; means for rotating said rollers in opposite directions to thus pull said web from said web supply roll in a direction substantially perpendicular to the longitudinal axes of said rollers; roll drive means coupled to said supply roll tending to rotate said supply roll in a direction to unwind said web toward said rollers, said roll drive means including a motor and a slip clutch coupling said motor to said supply roll; lock means coupled to said supply roll for preventing rotation thereof; and sensing means responsive to the tension on said web between said supply roll and said rollers for releasing said lock means.
Claim 2
Dependent Claim
178 words
A web feed system suitable for use in a high-speed printer, said system comprising: a web supply roll; means mounting said supply roll for rotation; first and second substantially cylindrical rollers; means mounting said rollers for rotation parallel to one another and spaced from one anothEr by a distance no greater than the thickness of said web whereby the surfaces of said rollers will frictionally engage opposite surfaces of a web passing therebetween; means for rotating said rollers in opposite directions to thus pull said web from said web supply roll in a direction substantially perpendicular to the longitudinal axes of said rollers; roll drive means coupled to said supply roll tending to rotate said supply roll in a direction to unwind said web toward said rollers, said roll drive means including a motor and a slip clutch coupling said motor to said supply roll; lock means coupled to said supply roll for preventing rotation thereof; and sensing means responsive to the tension on said web between said supply roll and said rollers for releasing said lock means.
Claim 3
Dependent Claim
54 words
The system of claim 1 wherein the circumferential surface of said first roller has a first groove spiralled in one direction extending from the center of said roller to a first end thereof and a second groove spiralled in an opposite direction extending from the center of said roller to a second end thereof.
Claim 4
Dependent Claim
54 words
The system of claim 2 wherein the circumferential surface of said second roller has a first groove spiralled in one direction extending from the center of said roller to a first end thereof and a second groove spiralled in an opposite direction extending from the center of said roller to a second end thereof.
Claim 5
Dependent Claim
34 words
The system of claim 3 including means for rotating said first and second rollers in opposite directions for causing each of said grooves to spiral outwardly from said roller centers to said roller ends.
Claim 6
Dependent Claim
27 words
The system of claim 1 wherein a circumferential portion of said first roller surface is enlarged and in contact with a portion of said second roller surface.
Claim 7
Dependent Claim
29 words
The system of claim 1 wherein said lock means includes: a sprocket wheel coupled to said supply roll; and pawl means for engaging the sprockets of said sprocket wheel.
Claim 8
Dependent Claim
44 words
The system of claim 6 wherein said sensing means includes: a buffer roller; means mounting said buffer roller for movement by engagement with said web between said supply roll and said web drive means; and means coupling said buffer roller to said pawl means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |