Patent US448555A successfully refreshed from Google Patents.
Patent US4277901A successfully refreshed from Google Patents.
US4277901A
Expired / Lapsed
US
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Watercolor paper stretcher
Assignee: AMOCO FOAM PRODUCTS Co
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Filing: 1979-03-26
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Granted: 1981-07-14
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Expires: 1999-03-26
Abstract
Abstract A downwardly open substantially box-like frame has the central portion of its top offset upwardly and lying in a horizontal plane spaced above the remaining portion of its top for flatly receiving a wet sheet of artist's watercolor paper. The frame top is further characterized by a recess surrounding its raised portion. A clamp surrounds the frame walls and includes an inwardly projecting flange overlying the frame top outwardly of the raised portion and impinging a marginal edge portion of the watercolor paper within the frame top recess. The frame and clamp member are maintained in watercolor paper clamped relation by an elongated binder gripping outward opposing surfaces of the respective juxtaposed side and end walls.
Inventors
- 👤 Hugh M. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:02
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/18; B44D3/185
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A watercolor paper stretcher, comprising: a one-piece box-like downwardly open sheet material frame having side and end walls joined by a generally horizontal top wall having an upper surface, said top wall having an elevated central planar portion lying in a plane spaced above the remaining marginal edge portions of said upper surface a distance at least equal to the thickness of the top wall for receiving a sheet of watercolor paper when superposed thereon with its marginal edge portions projecting beyond the perimeter of the elevated portion; and, sheet material clamp means surrounding said frame elevated portion for impinging the watercolor paper against said upper surface, said clamp means including a one-piece open clamp frame having side and end walls closely surrounding said frame side and end walls and having an inwardly projecting flange at its upper limit overlying said marginal edge portions of said upper surface in a plane below the plane of said elevated portion.
Claim 2
Dependent Claim
158 words
A watercolor paper stretcher, comprising: a one-piece box-like downwardly open sheet material frame having side and end walls joined by a generally horizontal top wall having an upper surface, said top wall having an elevated central planar portion lying in a plane spaced above the remaining marginal edge portions of said upper surface a distance at least equal to the thickness of the top wall for receiving a sheet of watercolor paper when superposed thereon with its marginal edge portions projecting beyond the perimeter of the elevated portion; and, sheet material clamp means surrounding said frame elevated portion for impinging the watercolor paper against said upper surface, said clamp means including a one-piece open clamp frame having side and end walls closely surrounding said frame side and end walls and having an inwardly projecting flange at its upper limit overlying said marginal edge portions of said upper surface in a plane below the plane of said elevated portion.
Claim 3
Dependent Claim
24 words
The paper stretcher according to claim 1 in which said inwardly projecting flange is provided with a coextensive depending lip facing said upper surface.
Claim 4
Dependent Claim
26 words
The paper stretcher according to claim 2 in which said upper surface is provided with an upwardly open recess underlying the position of said depending lip.
Claim 5
Dependent Claim
22 words
The paper stretcher according to claim 1 or 3 and further including: anchor means for securing said clamp means to said frame.
Claim 6
Dependent Claim
31 words
The paper stretcher according to claim 4 in which the anchor means includes: an elongated channel-like member frictionally enveloping the depending edge portions of the respective juxtaposed side and end walls.
Claim 7
Dependent Claim
64 words
The paper stretcher according to claim 4 in which the end and side walls of said frame diverge downwardly and said clamp means side and end walls are respectively substantially parallel and in which said anchor means includes: an elongated channel-like member frictionally enveloping the depending edge portions of the respective juxtaposed side and end walls for biasing said lip toward the frame recess.
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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |