Metal deforming – By deflecting successively-presented portions of work during... – By use of deflectors arranged to bend work longitudinally of...
Reexamination Certificate
2000-05-31
2001-10-09
Crane, Daniel C. (Department: 3725)
Metal deforming
By deflecting successively-presented portions of work during...
By use of deflectors arranged to bend work longitudinally of...
C072S173000
Reexamination Certificate
active
06298704
ABSTRACT:
BACKGROUND OF THE INVENTION
Bending machines, which are used to bend metal strips and sheets, typically load the machine in a direction which is generally perpendicular to the axis of rotation of rollers which engage the workpiece. The loading of a workpiece is done axially along the direction of movement of the workpiece as it passes through the bending machine. The bending machines typically are heavy appliances to cause the workpiece to bend. In light of the axial loading of the workpiece, along the axis of movement of the workpiece through the machine, the bending of the workpiece is done only in one direction so that it is difficult to have several bends in different directions and different amounts.
In certain applications, the workpiece is not thick nor very wide, such as, a part of a lighting system. It is desirable to form the workpiece at the location where the workpiece will be used. Such a application is one where the workpiece is part of a lighting system, and it is desired to form the workpiece with several curves. The workpiece may be formed around one of more corners. In some applications, a bend may be made for a particular purpose, such as, a specific location of a portion of the lighting system. To this end, it is desirable to provide a highly portable bending apparatus which may be transported to an installation site. The bending apparatus must be easily adjusted and easily operated in order to have appropriate bends made in the workpiece. Furthermore, it is desirable to exercise close control of the bending of the workpiece in order to have the proper bend of the workpiece for the given application.
SUMMARY OF THE INVENTION
The present invention is a portable workpiece bending apparatus for selectively bending an elongated workpiece at selected portions of the workpiece along its length. The bending of the workpiece may be done in either direction by allowing loading and unloading of the workpiece transaxially to the direction of movement of the workpiece through the bending apparatus. The apparatus includes a frame. Three rollers are rotatably mounted on the frame. Each of the rollers, when in an operative position, is adapted to engage a workpiece. The workpiece moves along its length through the apparatus to be bent selectively as it moves along its length. An actuator is connected to one of the rollers for selectively positioning that one roller relative to the other two rollers to allow the one roller to be disposed from an operative position engageable with the workpiece to a spaced apart position from the other two rollers and not in engagement with the workpiece. Positioning of the one roller in the spaced apart position allows the workpiece to be positioned for engagement with the rollers for bending by moving the workpiece transverse to its direction of movement when the workpiece is in operative engagement with the three rollers.
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Prima Lighting, Inc., Chandelier Kit Installation.
Wheelwright Equipment Photos, Jan. 11, 2000.
Rolls, Brakes, Shears & Pittsburgh Lock Former.
Central Machinery 12″ Shear, Press Brake, & Slip Roll.
Roper Whitney of Rockford, Inc., Aug. 24, 1999.
Crane Daniel C.
Juno Manufacturing, Inc.
Zummer Anthony S.
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