Flexible sheet sealing apparatus

• US 3,269,884 A
• Filed: 09/15/1961
• Issued: 08/30/1966
• Est. Priority Date: 09/15/1961
• Status: Expired due to Term

• Current Assignee: Richard J. Slater
• Original Assignee: Richard J. Slater
• Inventors: Slater, Richard J.
• Application Number:
  US04/138,517
• Time in Patent Office: 1,810 Days
• US Class Current: 156/545
• CPC Class Codes: B29C 65/18 using heated tools
• CPC Class Codes: B29C 65/4825 Pressure sensitive adhesives
• CPC Class Codes: B29C 65/5042 covering both elements to be joined
• CPC Class Codes: B29C 65/5092 characterised by the tape handling mechanisms, e.g. using vacuum
• CPC Class Codes: B29C 65/7847 using vacuum to hold at least one of the parts to be joined vacuum work holders in general B25B11/005
• CPC Class Codes: B29C 65/7894 of continuously moving sheets or webs
• CPC Class Codes: B29C 66/1142 Single butt to butt joints
• CPC Class Codes: B29C 66/43 Joining a relatively small portion of the surface of said articles B29C66/45 takes precedence
• CPC Class Codes: B29C 66/435 Making large sheets by joining smaller ones or strips together
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/8362 Rollers, cylinders or drums moving relative to and tangentially to the parts to be joined
• CPC Class Codes: B29C 66/86521 being self-propelling
• CPC Class Codes: B29C 66/86533 by rails
• CPC Class Codes: B29K 2023/06 PE, i.e. polyethylene
• CPC Class Codes: B29K 2067/003 PET, i.e. poylethylene terephthalate
• CPC Class Codes: Y10T 156/1717 Means applying adhesively secured tape to seam
• CPC Class Codes: Y10T 156/1795 Implement carried web supply

Claims

5. SEALING APPARATUS FOR JOINING TOGETHER TWO SHEETS A PLASTIC MATERIAL COMPRISING A STATIONARY TABLE FOR SUPPORTING ONE OF THE SHEETS, A GUIDE TRACK FIXEDLY DISPOSED WITH RESPECT TO SAID TABLE, A DOLLY ADAPTED TO BE ADVANCED ALONG THE FLOOR RELATIVE SAID TABLE, MEANS CARRIED BY SAID DOLLY SLIDABLE ENGAGED WITH SAID RICK, FOR CAUSING SAID DOLLY TO BE GUIDED BY SAID TRACK, A WHEEL ELEMENT ROTATABLY MOUNTED ON SAID PLATFORM HAVING A PERFORATED PERIPHERY, VACUUM MEANS CONNECTED TO SAID WHEEL SO AS TO DRAW AIR INTO SAID WHEEL VIA THE PERFORATIONS IN ITS PERIPHERY FOR TEMPORARILY HOLDING MARGINAL PORTIONS OF THE SHEETS TO BE JOINED, MEANS FOR ROTATING SAID WHEEL ELEMENT AT A RATE SUCH AS TO PRODUCE A PERIPHERAL SPEED CORRESPONDING TO THE RATE OF ADVANCEMENT OF SAID DOLLY, A SUPPLY OF HEAT SEALABLE TAPE, AND A HEATED BONDING WHEEL ELEMENT CARRIED BY SAID DOLLY AND SURMOUNTING SAID FIRST WHEEL ELEMENT FOR APPLYING SAID TAPE TO SAID ABUTTING MARGINAL PORTIONS OF SAID SHEETS WHILE SAID PORTIONS ARE TEMPORARILY HELD BY SAID FIRST WHEEL ELEMENT.