US PATENT SUBCLASS 72 / 149
.~ By use of work-contacting wiper and moving, work-holding form

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

127  DF  BY DEFLECTING SUCCESSIVELY-PRESENTED PORTIONS OF WORK DURING BODILY MOVEMENT THEREOF (E.G., FOR COILING, LEVELLING, CURVING OR TROUGHING MATERIAL IN MOVEMENT) {11}
149.~ By use of work-contacting wiper and moving, work-holding form {9}
150  DF  .~.~> With core inside hollow workpiece
151  DF  .~.~> With tensioning or work
152  DF  .~.~> With deforming or work or product (other than by wiper and former)
153  DF  .~.~> And means to impart compound motion to form
154  DF  .~.~> Including backed-up, travelling wiper (e.g., follow bar)
155  DF  .~.~> And means to urge wiper toward form surface
156  DF  .~.~> And interrelated means to move form and gripper element thereon
157  DF  .~.~> Including interchangeable or adjustable wiper or form {1}
159  DF  .~.~> And work-complementing gripper faces (e.g., contoured)

DEFINITION

Classification: 72/149

By use of work-contacting wiper and moving, work-holding form:

(under subclass 127) Subject matter wherein the instrumentality comprises: (1) a first member adjacent the work and engaging a surface thereof, to confine the work to movement along its original direction, and cooperating with (2) a second member movable in an arc about an axis-of-bend*, which axis-of-bend is disposed transversely of the direction of work movement, said second member having: (a) a peripheral surface tangent to said course and along which surface the work is to be laid thus imparting the shape of the surface to the product, and (b) means for temporarily securing a portion of said work to said surface so that the secured portion partakes of all movement of said second member, while trailing portions are constrained by the first member and the work is deformed by and between the two members.

(1) Note. The first (i.e., work-engaging) member is usually referred to in the art, and will hereinafter be referred to in these definitions, as a "wiper". The second (i.e., work-holding) member is usually referred to in the art, and will hereafter be referred to in these definitions, as a "former".

(2) Note. In operation, the work is held to the form tangent to the surface thereof and the form is rotated, usually through less than 360 deg.. In the absence of a wiper the work would revolve around the form with its lead end tangent thereto; however, the wiper is used to confine the underformed work portions to their original direction of movement. The work-gripping form thus pulls the work with the form surface as the form rotates, deflecting the gripped work portion and successive portions away from the course and partially around the axis-of-bend, and the wiper acts on successively presented work portions to urge the work into contact with successive portions of the form surface.