Patent US3570736A successfully refreshed from Google Patents.
US3570736A
Expired / Lapsed
US
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Paper tension and registration apparatus
Assignee: Unisys Corp
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Filing: 1969-01-06
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Granted: 1971-03-16
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Expires: 1989-01-06
Abstract
Abstract Apparatus for adjusting the phase relationship between a combination of shafts which are rotated by a common endless loop drive means. The combination of shafts may advance web material of indeterminate length, such as paper from a roll and/or advance a web and an endless format tape controlling the advance of the web. Adjusting the phase relationship between the shafts results in a corresponding change in the tension of the web being advanced and/or in the registration between the web and the format tape, respectively. Specifically, a pulley arrangement varies the respective lengths of the parts of the drive means between the shafts, and one shaft experiences a different rotation or phase adjustment relative to the other.
Inventors
- 👤 Raymond A Skiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:58
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/36; B41J11/42; B41J11/44
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
In a machine for advancing material through a work area and performing operations thereon under control of a format tape, the combination comprising: a first drive shaft for advancing said material, said first drive shaft being located in advance of said work area; a second drive shaft for advancing said material, said second drive shaft being located beyond said work area; a third drive shaft different and distinct from said first and second drive shafts for advancing said format tape; a single endless flexible drive means for imparting synchronous rotation to all of said drive shafts; means for independently adjusting the tension of said material advancing between said first and second drive shafts and over said work area; and means independent of said tension-adjusting means for adjusting the registration between said material and said format tape.
Claim 2
Dependent Claim
136 words
In a machine for advancing material through a work area and performing operations thereon under control of a format tape, the combination comprising: a first drive shaft for advancing said material, said first drive shaft being located in advance of said work area; a second drive shaft for advancing said material, said second drive shaft being located beyond said work area; a third drive shaft different and distinct from said first and second drive shafts for advancing said format tape; a single endless flexible drive means for imparting synchronous rotation to all of said drive shafts; means for independently adjusting the tension of said material advancing between said first and second drive shafts and over said work area; and means independent of said tension-adjusting means for adjusting the registration between said material and said format tape.
Claim 3
Dependent Claim
129 words
The combination of claim 1 wherein said tension-adjusting means includes: first and second pulleys mounted on said first and second drive shafts, said endless flexible drive means being looped around said pulleys for imparting rotation to said shafts, said pulleys dividing said endless flexible drive means into two sections; a plate mounted for rotational movement about one of said first and second drive shafts; means for rotating said plate; and guide means mounted on said plate for engaging said two sections, said guide means being responsive to said plate rotation for displacing the path of each of said two sections by substantially opposite deflections and varying the phase of one of said first and second drive shafts with respect to the other of said first and second drive shafts.
Claim 4
Dependent Claim
122 words
The combination of claim 1 wherein said registration-adjusting means includes: first and second pulleys mounted on said third drive shaft and second drive shafts respectively, said endless flexible drive means being looped around said pulleys for imparting rotation to said shafts, said pulleys dividing said endless flexible drive into two sections; a plate mounted for rotational movement about said third drive shaft; means for rotating said plate; and guide means mounted on said plate for engaging said two sections, said guide means being responsive to said plate rotation for displacing the path of each of said two sections by substantially opposite deflections and varying the phase of said third drive shaft with respect to said one of first and second drive shafts.
References Cited (Backward Citations)
US3154233A
Cited
US3381867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |