US PATENT SUBCLASS 72 / 51
.~ To form longitudinally-seamed tube

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

48  DF  BY TOOL-COUPLE PRESSING TOGETHER ADJACENT SURFACE PORTIONS OF SAME WORK (E.G., TUBE-SEAMER) {2}
51.~ To form longitudinally-seamed tube {1}
52  DF  .~.~> During longitudinal movement of work

DEFINITION

Classification: 72/51

To form longitudinally seamed tube:

(under subclass 48) Subject matter wherein a tool couple joins together the margins of a piece of work that has been made by deforming metal having thickness, width, and length dimensions, the length being appreciably greater than the

thickness of the width, so that side margins parallel to the length contact one another, whereby the product formed is a conduit or pipe having a joint parallel to the length.