US4618085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet separating apparatus
Assignee: Toshiba Corp
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Filing: 1984-06-29
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Granted: 1986-10-21
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Expires: 2004-06-29
Abstract
Abstract A sheet separating apparatus is designed so that tension is applied to a continuous sheet having weakened lines arranged thereon at predetermined distances so that the continuous sheet is separated along the weakened lines. The sheet separating apparatus comprises first and second conveying mechanisms spaced from each other and adapted to transfer the continuous sheet and to increase tension on the continuous sheet along the course of transfer thereof, and a guide roller for maximizing the increased tension at a predetermined position in the continuous sheet, thereby starting separation of the continuous sheet at that portion of each weakened line which corresponds to the predetermined position.
Inventors
- 👤 Tokuji Kimura
- 👤 Toshio Urushihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:33
CPC Classifications
B; B65; B65H; B65H35/00; B65H35/10; Y; Y10; Y10T; Y10T225/00; Y10T225/10; Y10T225/16; Y10T225/30; Y10T225/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A sheet separating apparatus for separating a sheet, which is elongated in a longitudinal direction and includes a plurality of weakened lines each crossing the longitudinal direction of said sheet, into a plurality of relatively small pieces along said weakened lines, said apparatus comprising: first tensioning means for applying tension to said sheet in said longitudinal direction thereof; and second tensioning means for applying additional tension in said longitudinal direction which additional tension is non-uniform along successive weakened lines and which additional tension is applied while said sheet is being tensioned by said first tensioning means; wherein said second tensioning means includes a roller located in a fixed position and having an axis extending across the width of said sheet, said roller including a plurality of disks space apart along said axis, said disks gradually decreasing in diameter from a central portion of said roller toward each end of said roller, the outer peripheries of said disks abutting against said sheet to apply non-uniform tension along the width of said sheet.
Claim 2
Dependent Claim
171 words
A sheet separating apparatus for separating a sheet, which is elongated in a longitudinal direction and includes a plurality of weakened lines each crossing the longitudinal direction of said sheet, into a plurality of relatively small pieces along said weakened lines, said apparatus comprising: first tensioning means for applying tension to said sheet in said longitudinal direction thereof; and second tensioning means for applying additional tension in said longitudinal direction which additional tension is non-uniform along successive weakened lines and which additional tension is applied while said sheet is being tensioned by said first tensioning means; wherein said second tensioning means includes a roller located in a fixed position and having an axis extending across the width of said sheet, said roller including a plurality of disks space apart along said axis, said disks gradually decreasing in diameter from a central portion of said roller toward each end of said roller, the outer peripheries of said disks abutting against said sheet to apply non-uniform tension along the width of said sheet.
References Cited (Backward Citations)
US2268190A
Cited
US2375542A
Cited
US2800180A
Cited
US3070009A
Cited
US3135446A
Cited
GB1172641A
Cited
GB1326814A
Cited
GB1356767A
Cited
US3792807A
Cited
US4145035A
Cited
GB1558749A
Cited
US4397410A
Cited
GB2039265A
Cited
US4454973A
Cited
GB2131400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |