Printing – Stenciling – Stencils
Patent
1990-10-04
1991-12-31
Burr, Edgar S.
Printing
Stenciling
Stencils
1603741, 160378, 160381, 381028, B41F 1534
Patent
active
050761625
ABSTRACT:
An expandable mesh frame is disclosed for stretching and holding a mesh fabric. The frame consists of four frame rails held together by four corner pieces. The corner pieces fit within the ends of the frame rails to construct the frame and in action with the frame rails provide a selective locking mechanism. When the frame rails are rotated in one direction, as when a fabric mesh is in place on the frame and tension is applied to the mesh, the corner pieces and the frame rail are in an alignment that allows for zero tolerance locking; however, when the frame rails are rotated in the oppposite direction, as when the frame is being disassembled, there is an excess of tolerance between the frame rail and corner pieces. The selective locking mechanism allows for a frame that is easily assembled and disassembled because of the excess tolerance when the frame is in the slack position. However, when the frame is in the locked position, as when a fabric mesh is in place, the existence of zero tolerance between the corner piece and frame rail provides for a rigid dimensionally stable frame which will hold the fabric mesh securely. In addition to ease of assembly and disassembly, the frame is designed to fit current silk screen presses. Additionally, adjustment of the frame is possible while the frame is in place in the press which allows for ease of re-tensioning without removing the frame from the press.
REFERENCES:
patent: 3211089 (1965-10-01), Messerschmitt
patent: 3230872 (1966-01-01), De Groot
patent: 3409133 (1968-11-01), Malfroy
patent: 3477574 (1969-11-01), Malfroy
patent: 3482343 (1969-12-01), Hamu
patent: 3485165 (1969-12-01), Hughes
patent: 3625274 (1971-12-01), Johnson
patent: 3908293 (1975-09-01), Newman
patent: 4144660 (1979-03-01), Lamb
patent: 4409749 (1983-10-01), Hamu
patent: 4452138 (1984-06-01), Bubley et al.
Burr Edgar S.
Funk Stephen R.
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