Patent US3886990A successfully refreshed from Google Patents.
US3886990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral universal stretcher bar
Assignee: Individual
•
Filing: 1973-04-23
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Granted: 1975-06-03
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Expires: 1993-04-23
Abstract
Abstract A stretcher mechanism for canvas consisting of a substantially rectangular base member and a flap secured to each side of the base member by a living hinge. The canvas is secured to the flaps and the flaps are pivoted about their hinges through a segment of an arc, thereby causing the canvas to be placed under equal tension in four directions.
Inventors
- 👤 Joseph C Campione
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:11
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/18; B44D3/185
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
An assembly for stretching a canvas comprising: a substantially rectangular base having an opening therein; a plurality of flaps; flexible means pivotally securing one of said flaps to each side of said base, said flaps extending outwardly away from the side of said base in spaced complementary relationship thereto; means for (maintaining) securing said flaps to the sides of said base in complementary juxtaposition to the sides of said base, whereby a canvas secured to said flaps is maintained in a taut condition between said flaps and the sides of said base.
Claim 2
Dependent Claim
92 words
An assembly for stretching a canvas comprising: a substantially rectangular base having an opening therein; a plurality of flaps; flexible means pivotally securing one of said flaps to each side of said base, said flaps extending outwardly away from the side of said base in spaced complementary relationship thereto; means for (maintaining) securing said flaps to the sides of said base in complementary juxtaposition to the sides of said base, whereby a canvas secured to said flaps is maintained in a taut condition between said flaps and the sides of said base.
Claim 3
Dependent Claim
92 words
An assembly for stretching a canvas comprising: a substantially rectangular base having an opening therein; a plurality of flaps; flexible means pivotally securing one of said flaps to each side of said base, said flaps extending outwardly away from the side of said base in spaced complementary relationship thereto; means for (maintaining) securing said flaps to the sides of said base in complementary juxtaposition to the sides of said base, whereby a canvas secured to said flaps is maintained in a taut condition between said flaps and the sides of said base.
Claim 4
Dependent Claim
92 words
An assembly for stretching a canvas comprising: a substantially rectangular base having an opening therein; a plurality of flaps; flexible means pivotally securing one of said flaps to each side of said base, said flaps extending outwardly away from the side of said base in spaced complementary relationship thereto; means for (maintaining) securing said flaps to the sides of said base in complementary juxtaposition to the sides of said base, whereby a canvas secured to said flaps is maintained in a taut condition between said flaps and the sides of said base.
Claim 5
Dependent Claim
20 words
An assembly in accordance with claim 1, wherein said flexible means and said securing means comprise an adhesive faced tape.
Claim 6
Dependent Claim
28 words
An assembly in accordance with claim 1, wherein said means for Securing said flaps in complementary juxtaposition to the sides of said base comprises an adhesive faced tape.
References Cited (Backward Citations)
US2096559A
Cited
US3238996A
Cited
US3273497A
Cited
US3477574A
Cited
US3559316A
Cited
US3662807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |