Sheet stretching device
OwnerDaniel Jacobinventor
Life of this patent
Estimating the term…
Abstract
An apparatus for stretching a sheet of material such as a sheet of watercolor paper utilizes a flat board and a frame assembly for bending the board into a dish shape. The board has a plurality of radially extending segments separated by radially extending slots therebetween. The board is bent into a dish shape by a mechanism attached to the frame. The sheet is then affixed to the bent board with anchors while the frame is attached to the board and subsequently the frame is released from the bent board allowing the board to resume its originally flat condition thereby resulting in the sheet being stretched.
Claims30
A stretching device for a sheet of material comprising:
- a. a substantially flat board having a plurality of through slots originating from substantially equally spaced points along the periphery of said board and terminating at points on the board that result in segments of said board residing between said through slots and said segments having predetermined, desirable bending characteristics;
- and
- b. at least one attaching means located inwardly of said slot terminating points.
A stretching device for a sheet of material comprising:
- a. a substantially flat board having a plurality of through slots originating from substantially equally spaced points along the periphery of said board and pointing generally towards the central region of said board, said slots terminating at points on said board that result in segments of said board residing between said through slots and said segments having predetermined, desirable bending characteristics;
- and
- b. at least one attaching means located inwardly of said slot terminating points.
A stretching device for a sheet of material comprising:
- a substantially flat board having a plurality of through slots originating from substantially equally spaced points along the periphery of said board and pointing generally towards the center of said board, said slots terminating at respective points more than one quarter, but less than three quarters, the distance between the origin of said slots and the center of said board.
A stretching device for a sheet of material comprising:
- a. a substantially flat board having a plurality of through slots originating from substantially equally spaced points along the periphery of said board and terminating at points on said board that result in segments of said board residing between said through slots and said segments having predetermined, desirable bending characteristics;
- b. at least one attaching means located inwardly of said slot terminating points;
- c. a frame configured to cooperate with said board when placed on top of said board by preventing the edges of said board from moving beyond the periphery of said frame;
- and
- d. pulling means attached to said frame and removably attached to said attaching means on said board whereby the activation of said pulling means results in the movement of the central region of said board perpendicularly to the surface of said board.
A stretching device for a sheet of material comprising:
- a. a substantially flat board having a plurality of through slots originating from substantially equally spaced points along the periphery of said board and terminating at points on the board that result in segments of said board residing between said through slots and said segments having predetermined, desirable bending characteristics;
- b. at least one attaching means located inwardly of said slot terminating points;
- c. a frame configured to cooperate with said board when placed on top of said board by preventing the edges of said board from moving beyond the periphery of said frame;
- d. a crossbar spanning across the top of said frame having a hole substantially at its center;
- and
- e. a screw and nut assembly attached to said attaching means on said board and passing through said hole in said crossbar so that the rotation of said nut results in the movement of the center region of said board perpendicularly to said board surface.
A stretching device for a sheet of material comprising:
- a substantially flat board having a plurality of through slots originating from points along the periphery of said board and terminating at points inwardly of said board that result in segments of said board residing between said through slots and said segments having predetermined, desirable bending characteristics and wherein the ends of said segments are free around the periphery of said board.
Dependencies are inferred from the claim text.