US3743154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper guide
Assignee: 3M Co
•
Filing: 1972-01-03
•
Granted: 1973-07-03
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Expires: 1992-01-03
Abstract
Abstract A guide for use between two driving members of a web or sheet transport where one feeding member feeds the web at a velocity greater than the succeeding feeding member which receives the web. The guide permits a controlled transverse bend to develop in the web between the feeding members to accommodate various lengths of web before operation of the first feeding member is interrupted.
Inventors
- 👤 G Brewitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:36
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/28; B65H20/00; B65H20/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
289 words
In a web transport apparatus having a first web feeding member for moving various lengths of web at a first speed and a spaced second web feeding member for moving the web at a second speed slower than said first speed, said first member and second member being spaced less than the shortest length of web to be moved by said members and a guide forming a guide path between said first and second members for directing the web from the first to the second member, said guide comprising means defining a first semicylindrical guide surface positioned for receiving a web fed from said first member and for directing the free end thereof along a first continuous portion of a guide path toward the second member through an arc of approximately 90*, said first surface terminating in a position spaced from said second member, and means defining a second semicylindrical guide surface positioned to continue the guide path and to engage the same side of the web as the first surface with one edge adjacent said second member and extending toward the first feeding member with the other edge spaced radially in relationship to the first surface for defining a second portion of the guide path offset away from the portion of said first surface between said feeding members whereby a web being driven by said first and second feeding members will be placed in said first portion and when subject to compression will be deflected to contact said second surface along an extent thereof such that the offset relationship will place a transversely extending roll in a web which exceeds the distance between said first and second feeding members along the guide path defined by the guide surfaces.
Claim 2
Dependent Claim
289 words
In a web transport apparatus having a first web feeding member for moving various lengths of web at a first speed and a spaced second web feeding member for moving the web at a second speed slower than said first speed, said first member and second member being spaced less than the shortest length of web to be moved by said members and a guide forming a guide path between said first and second members for directing the web from the first to the second member, said guide comprising means defining a first semicylindrical guide surface positioned for receiving a web fed from said first member and for directing the free end thereof along a first continuous portion of a guide path toward the second member through an arc of approximately 90*, said first surface terminating in a position spaced from said second member, and means defining a second semicylindrical guide surface positioned to continue the guide path and to engage the same side of the web as the first surface with one edge adjacent said second member and extending toward the first feeding member with the other edge spaced radially in relationship to the first surface for defining a second portion of the guide path offset away from the portion of said first surface between said feeding members whereby a web being driven by said first and second feeding members will be placed in said first portion and when subject to compression will be deflected to contact said second surface along an extent thereof such that the offset relationship will place a transversely extending roll in a web which exceeds the distance between said first and second feeding members along the guide path defined by the guide surfaces.
Claim 3
Dependent Claim
43 words
A web transport according to claim 1 wherein said means defining said guiding surfaces is a single member having a first semicylindrical portion joined by an angularly positioned portion to a second semicylindrical portion, the axes of said semicylindrical portions being substantially parallel.
References Cited (Backward Citations)
US1898850A
Cited
US2569364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |