Flexible or portable closure – partition – or panel – Framed type – Adjustable frame size
Patent
1990-07-27
1991-10-01
Purol, David M.
Flexible or portable closure, partition, or panel
Framed type
Adjustable frame size
160381, 381025, D06C 308
Patent
active
050524623
ABSTRACT:
A canvas tensioning picture frame formed by a plurality of adjacent frame members having complementary first and second half-cavities formed in the ends thereof, a complementary half-bore extending between the first and second cavities, a first disk having a central aperture, a second disk having a central aperture, and a frusto-conical screw having a head sized to be received by the central aperture of the first disk. The first disk is disposed within a first cavity formed of the two first half-cavities of adjacent frame members and is manually rotatable therein. The second disk is disposed within a second cavity formed of the two second half-cavities of adjacent frame members and is firmly engaged therein to limit relative movement of adjacent frame members. The frusto-conical screw is turned by rotating the first disk and thus driving the frusto-conical screw downwardly into a bore formed by the two complimentary half-bores of adjacent frame members. This action urges the two adjacent frame members apart, thus increasing the enclosed area of the frame and stretching a canvas attached thereto.
REFERENCES:
patent: 371933 (1887-10-01), Gray
patent: 371934 (1887-10-01), Gray
patent: 1128362 (1915-02-01), Rawbon
patent: 2149985 (1939-03-01), Tepper
patent: 3238996 (1966-03-01), Munn
patent: 4829685 (1989-05-01), Persson et al.
patent: 4947922 (1990-08-01), Stobart
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