US3767097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handling webs of material
Assignee: Vickers Ltd
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Filing: 1973-02-05
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Granted: 1973-10-23
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Expires: 1993-02-05
Abstract
Abstract Relative displacement, at a working site, between first and second webs of material in face-to-face contact at that site is inhibited by selecting the first web to be of smaller surface area than the second at the site and by establishing thereat a reduced pressure adjacent that face of the first web which is away from the second web, thereby causing the second web to be drawn against the first web at the working site.
Inventors
- 👤 P Watts
- 👤 A Kent
- 👤 Riley K O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
B; B65; B65H; B65H39/00; B65H39/16; B65H23/00; B65H23/04; B65H23/24; B65H2301/00; B65H2301/50; B65H2301/51; B65H2301/516
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
A method of inhibiting relative movement between first and second webs of material that are fed to a working site at which the webs lie face to face, wherein the said first web is selected to be of smaller surface area than the second web at the working site; and a reduced pressure is established, at that site, adjacent that face of the first web which is away from the second web; said reduced pressure acting on the second web, to draw the second web against the first web, by virtue of said smaller surface area.
Claim 2
Independent Claim
96 words
A method of inhibiting relative movement between first and second webs of material that are fed to a working site at which the webs lie face to face, wherein the said first web is selected to be of smaller surface area than the second web at the working site; and a reduced pressure is established, at that site, adjacent that face of the first web which is away from the second web; said reduced pressure acting on the second web, to draw the second web against the first web, by virtue of said smaller surface area.
Claim 3
Dependent Claim
28 words
The method of claim 1, wherein the first web is provided with apertures to make it of smaller surface area than the second web at the working site.
Claim 4
Dependent Claim
18 words
The method of claim 2, wherein said apertures are confined to lateral edge regions of the first web.
Claim 5
Dependent Claim
27 words
The method of claim 1, wherein lateral edge regions of the second web extend beyond respectively adjacent lateral edges of the first web at the working site.
Claim 6
Dependent Claim
83 words
The method of claim 1, wherein said working site is bounded by wall means extending along and around mutually adjacent lateral edge regions of the respective webs, there being defined between said wall means and said mutually adjacent lateral edge regions at least one passageway whereby a region adjacent that face of the second web which is away from the first web communicates with the region of reduced pressure adjacent that face of the first web which is away from the second web.
Claim 7
Dependent Claim
22 words
The method of claim 5, wherein said wall means are arranged to guide longitudinal motion of the webs at the working site.
Claim 8
Dependent Claim
105 words
Web-handling apparatus for controlling the positioning of first and second webs, comprising: web support means defining a working site at which respective lengths of the first and second webs are provided face to face, the first web being of smaller surface area than the second at said working site; and pump means, in communication with said working siTe, for establishing a reduced pressure adjacent that face of the first web which is away from the second web at the working site, said reduced pressure acting on the second web, to draw the second web against the first web, by virtue of said smaller surface area.
Claim 9
Dependent Claim
105 words
Web-handling apparatus for controlling the positioning of first and second webs, comprising: web support means defining a working site at which respective lengths of the first and second webs are provided face to face, the first web being of smaller surface area than the second at said working site; and pump means, in communication with said working siTe, for establishing a reduced pressure adjacent that face of the first web which is away from the second web at the working site, said reduced pressure acting on the second web, to draw the second web against the first web, by virtue of said smaller surface area.
Claim 10
Dependent Claim
81 words
The apparatus of claim 7, including wall means arranged to extend along and around mutually adjacent lateral edge regions of the respective webs such that there is defined between said wall means and said mutually adjacent lateral edge portions at least one passageway whereby a region adjacent that face of the second web which is away from the first web communicates with the region of reduced pressure adjacent that face of the first web which is away from the second web.
Claim 11
Dependent Claim
22 words
The apparatus of claim 8, wherein said wall means are arranged to guide longitudinal motion of the webs at the working site.
Claim 12
Dependent Claim
47 words
The apparatus of claim 7, wherein the web support means comprise a support member providing a support surface for the first web at the working site, said support member being provided with apertures which open into said support surface and are in communication with said pump means.
Claim 13
Dependent Claim
24 words
The apparatus of claim 7, including web supply means for delivering the respective lengths of the first and second webs to the working site.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |