US3608482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking bar for screen-printing frame
Assignee: American Screen Printing Equipment Co
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Filing: 1969-10-31
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Granted: 1971-09-28
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Expires: 1989-10-31
Abstract
Abstract A screen-printing frame having a screen-tensioning arrangement including a frame supporting a channel member which receives a locking bar. The screen material is positioned over the channel and the locking bar inserted to force the screen into the channel where it is positively gripped. Means is provided to move the channel relative to the frame to provide for tensioning after the screen is securely gripped. The tension on the screen serves to move the locking bar into tighter engagement with the channel, thus increasing the grip on the screen. Resilient means is provided in the bottom of the channel to maintain the screen material in engagement with the locking bar during initial insertion and rotation of the bar to the locked position. The screen material may be easily removed and other screen material with or without an image installed.
Inventors
- 👤 Henry J Bubley
- 👤 Claude H Oltra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:50
CPC Classifications
B; B41; B41F; B41F15/00; B41F15/14; B41F15/34; B41F15/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
248 words
A screen-tensioning arrangement for locking screen material which may be coated or uncoated to a locking frame, said tensioning arrangement comprising a longitudinally extending channel member having upstanding flanges, a longitudInally extending locking bar disposed between said flanges, said locking bar having at least a portion thereof formed with an arcuate surface, said arcuate surface being disposed below the upper margin of said flanges when said locking bar is installed in said channel member between said flanges, the minimum cross-sectional dimension as measured across said arcuate portion being greater than the minimum dimension as measured between said flanges, a portion of said locking bar having a maximum cross-sectional dimension as measured generally perpendicular to a plane incorporating the top surfaces of said flanges when said locking bar is installed, which maximum dimension is lesser than the minimum width of said channel to facilitate insertion of said locking bar into said channel by positioning said portion at an angle to said plane, said screen material being wrapped around said arcuate surface, a portion of said arcuate surface being in opposition to the upper portion of each of said flanges thereby to clamp said screen material between said arcuate portion and said flanges, said screen material, when tensioned, acting to rotate said locking bar relative to said channel member, and means on said locking bar overlying one of said flanges and engageable with a top surface thereon to limit the rotation of said locking bar relative to said channel member.
Claim 2
Dependent Claim
248 words
A screen-tensioning arrangement for locking screen material which may be coated or uncoated to a locking frame, said tensioning arrangement comprising a longitudinally extending channel member having upstanding flanges, a longitudInally extending locking bar disposed between said flanges, said locking bar having at least a portion thereof formed with an arcuate surface, said arcuate surface being disposed below the upper margin of said flanges when said locking bar is installed in said channel member between said flanges, the minimum cross-sectional dimension as measured across said arcuate portion being greater than the minimum dimension as measured between said flanges, a portion of said locking bar having a maximum cross-sectional dimension as measured generally perpendicular to a plane incorporating the top surfaces of said flanges when said locking bar is installed, which maximum dimension is lesser than the minimum width of said channel to facilitate insertion of said locking bar into said channel by positioning said portion at an angle to said plane, said screen material being wrapped around said arcuate surface, a portion of said arcuate surface being in opposition to the upper portion of each of said flanges thereby to clamp said screen material between said arcuate portion and said flanges, said screen material, when tensioned, acting to rotate said locking bar relative to said channel member, and means on said locking bar overlying one of said flanges and engageable with a top surface thereon to limit the rotation of said locking bar relative to said channel member.
Claim 3
Dependent Claim
43 words
The screen-tensioning arrangement as defined in claim 1 wherein resilient means is provided in the lower part of said channel member to bias said screen material against said locking bar whereby it will be lockingly gripped between said channel member and locking bar.
Claim 4
Dependent Claim
50 words
The screen-tensioning arrangement of claim 1 wherein said means on said locking bar to limit rotation relative to said channel member comprises a continuous handle formed integral with said locking bar and extending along the upper margin of one of said webs to facilitate installation and removal of said screen.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |