US4357869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for stretching and fixing a cloth on a frame
Assignee: Individual
•
Filing: 1979-04-12
•
Granted: 1982-11-09
•
Expires: 1999-04-12
Abstract
Abstract The invention refers to a device for stretching and fixing a cloth on a frame and comprises a stand with a rectangular border, a bottom and an underframe. On the bottom an inflatible pad is arranged, against which a pressure plate rests. The pressure plate is somewhat smaller than the border of the stand and is moveable in relation to that and adjustable into different angles relative to the bottom. A clamping device can be placed above the border and is by tightening means pressed against the stand, thereby clamping the cloth against the border.
Inventors
- 👤 Gosta Wadstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:27
CPC Classifications
B; B41; B41F; B41F15/00; B41F15/14; B41F15/34; B41F15/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
A device for stretching and fixing a cloth such as a screen, strainer, bolting, filter cloth or the like on a frame comprising a frame-shaped stand having a border defining a free space therewithin, a clamping edge on said border, a pressure plate movable within the border of the stand and extending over a substantial part of the free space within said border and at least one member acting upon the pressure plate for displacing the pressure plate with respect to the stand, said frame-shaped stand being provided with a bottom, said member comprising at least one resilient expandable pad inflatable with a fluid and arranged between said bottom of the stand and the pressure plate, the pressure plate having outer peripheral dimensions a predetermined amount smaller than the outer peripheral dimensions of said free space so that the pressure plate is self-adjustable in different angles in relation to said bottom, and a clamping device removably attachable to said stand for clamping the cloth on all sides against the clamping edge of said border, comprising a clamping frame and clamping means for tightening said clamping frame against said clamping edge.
Claim 2
Independent Claim
190 words
A device for stretching and fixing a cloth such as a screen, strainer, bolting, filter cloth or the like on a frame comprising a frame-shaped stand having a border defining a free space therewithin, a clamping edge on said border, a pressure plate movable within the border of the stand and extending over a substantial part of the free space within said border and at least one member acting upon the pressure plate for displacing the pressure plate with respect to the stand, said frame-shaped stand being provided with a bottom, said member comprising at least one resilient expandable pad inflatable with a fluid and arranged between said bottom of the stand and the pressure plate, the pressure plate having outer peripheral dimensions a predetermined amount smaller than the outer peripheral dimensions of said free space so that the pressure plate is self-adjustable in different angles in relation to said bottom, and a clamping device removably attachable to said stand for clamping the cloth on all sides against the clamping edge of said border, comprising a clamping frame and clamping means for tightening said clamping frame against said clamping edge.
Claim 3
Dependent Claim
43 words
A device according to claim 1, and further comprising a friction lining and an elastic pressure lining disposed at the clamping interface between said clamping frame and clamping edge so that the cloth passes between said linings to be held thereby in use.
Claim 4
Dependent Claim
35 words
A device according to claim 1 or 2, wherein said expandable pad is inflated pneumatically and is made of a plastic material, said pad being divided into a number of compartments communicating with each other.
References Cited (Backward Citations)
US1778385A
Cited
CH208446A
Cited
DE892582C
Cited
DE1083218B
Cited
CH402790A
Cited
US3391635A
Cited
DE1802686A1
Cited
US3608484A
Cited
US3608517A
Cited
US3608482A
Cited
DE2020958C3
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |