Patent US3575328A successfully refreshed from Google Patents.
US3575328A
Expired / Lapsed
US
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Dispenser for flexible sheet material and a perforating mechanism adapted to be used therein
Assignee: Georgia-Pacific LLC
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Filing: 1969-01-24
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Granted: 1971-04-20
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Expires: 1989-01-24
Abstract
Abstract A mechanism for perforating a web of flexible sheet material which is adapted to be used in a flexible sheet material dispenser, said mechanism comprising; a rotatably mounted roller, a rotatably mounted knife positioned adjacent the roller and having a radially outward portion defining a cutting edge for perforating the web as the web passes between the roller and the knife, the roller being operatively connected to the knife for synchronous rotation therewith and having a slot therein for receiving the radially outward knife portion as the knife rotates past the roller, and means associated with the knife for orienting the cutting edge substantially in the direction in which the radially outward knife portion moves with respect to the web during the entrance of the portion into the slot so that when the portion enters the slot the cutting edge will effectively perforate the web.
Inventors
- 👤 Paul W Jespersen
- 👤 Edward L Bump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:04
CPC Classifications
B; B65; B65H; B65H35/00; B65H35/0006; B65H35/006; A; A47; A47K; A47K10/00; A47K10/24; A47K10/32; A47K10/34; A47K10/36; A47K10/3631; A47K10/3643; A47K10/3656; B65H35/002; Y; Y10; Y10T; Y10T225/00; Y10T225/10; Y10T225/12; Y10T225/16; Y10T225/30; Y10T225/307; Y10T225/321; Y10T225/393; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/4804; Y10T83/929; Y10T83/9372; Y10T83/9408
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
A method for dispensing flexible sheet material from a dispenser having a roll of said material rotatably supported therein, said method comprising the steps of: moving the leading edge of a web of said material outside the dispenser to a position to be grasped by a user independently of a user touching the dispenser; applying a pulling force adjacent said leading edge to pull the web from the dispenser; perforating the web substantially transversely thereof while the web is being pulled from the dispenser; and abruptly applying an arresting force to the web between said roll and the perforations formed iN the web by said perforating step to abruptly stop the web so that a sheet of said material is torn from the web along said perforations.
Claim 2
Independent Claim
127 words
A method for dispensing flexible sheet material from a dispenser having a roll of said material rotatably supported therein, said method comprising the steps of: moving the leading edge of a web of said material outside the dispenser to a position to be grasped by a user independently of a user touching the dispenser; applying a pulling force adjacent said leading edge to pull the web from the dispenser; perforating the web substantially transversely thereof while the web is being pulled from the dispenser; and abruptly applying an arresting force to the web between said roll and the perforations formed iN the web by said perforating step to abruptly stop the web so that a sheet of said material is torn from the web along said perforations.
Claim 3
Dependent Claim
93 words
A method as recited in claim 1; wherein said arresting force is applied to the web while said perforations are inside the dispenser so that after said sheet is torn from the web, said leading edge will be inside the dispenser and inaccessible to a user; and wherein said leading edge is moved outside the dispenser to a position to be grasped by a user a predetermined length of time after the web is abruptly stopped so that said leading edge is again accessible to a user after said predetermined length of time.
Claim 4
Dependent Claim
77 words
A method as recited in claim 1, wherein said arresting force is applied to the web after said perforations are outside the dispenser so that after said sheet is torn from the web, said leading edge is outside the dispenser and immediately accessible to a user, whereby said leading edge is moved outside the dispenser to a position to be grasped by a user upon the dispensing of the previous sheet of said material from the dispenser.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |