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Web lapping apparatus

  • US 3,338,575 A
  • Filed: 03/10/1965
  • Issued: 08/29/1967
  • Est. Priority Date: 03/10/1965
  • Status: Expired due to Term
First Claim
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1. APPARATUS FOR WEB LAPPING, COMPRISING A FRAME, A CUTTING ROLL ROTATABLY MOUNTED ON SAID FRAME, SAID CUTTING ROLL BEING EQUIPPED WITH LONGITUDINALLY-EXTENDING VACUUM PORT MEANS IN THE SURFACE THEREOF FOR ADVANCING A WEB WITH SAID CUTTING ROLL IN PARTIAL WRAPPING ENGAGEMENT THEREWITH, KNIFE MEANS ON SAID FRAME OPERABLY ASSOCIATED WITH SAID CUTTING ROLL FOR TRANSVERSELY SEVERING SAID WEB ALONG LONGITUDINALLY SPACED-APART LINES TO PROVIDE A SUCCESSION OF DISCRETE SHEETS, A RETARD ROLL ROTATABLY MOUNTED ON SAID FRAME IN PARALLLEL, SIDE-BY-SIDE RELATION TO SAID CUTTING ROLL, SAID RETARD ROLL BEING EQUIPPED WITH LONGITUDINALLY-EXTENDING VACUUM PORT MEANS IN THE SURFACE THEREOF FOR TRANSFERRING SAID WEB SHEETS FROM SAID CUTTING ROLL, AND VACUUM MEANS INTERPOSED ADJACENT THE PATH OF A SHEET BEING TRANSFERRED FROM SAID CUTTING ROLL TO SAID RETARD ROLL FOR DISPLACING THE TRAILING PORTION OF SAID SHEET, AND MEANS FOR ROTATING SAID RETARD ROLL AT A SURFACE SPEED SLOWER THAN THE SURFACE SPEED OF SAID CUTTING ROLL.

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