FRICTION WELDING OF PLASTIC STRAPPING

• US 3,554,845 A
• Filed: 11/17/1967
• Issued: 01/12/1971
• Est. Priority Date: 11/17/1967
• Status: Expired due to Term

• Current Assignee: Cyklop Strapping Corporation
• Original Assignee: Ronald J. Billett, Terence H. West
• Inventors: Billett, Ronald J., West, Terence H.
• Application Number:
  US04/683,943
• Time in Patent Office: 1,152 Days
• US Class Current: 156/580
• CPC Class Codes: B29C 65/0636 Orbital
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/4322 by joining a single sheet to itself B29C66/4332 takes precedence
• CPC Class Codes: B29C 66/4324 for making closed loops, e.g. belts
• CPC Class Codes: B29C 66/49 Internally supporting the, e.g. tubular, article during joining B29C66/63 takes precedence
• 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 66/73711 oriented
• CPC Class Codes: B29C 66/8122 characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
• CPC Class Codes: B29C 66/81264 Mechanical properties, e.g. hardness
• CPC Class Codes: B29C 66/81265 Surface properties, e.g. surface roughness or rugosity
• CPC Class Codes: B29C 66/81427 comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
• CPC Class Codes: B29C 66/81457 comprising a block or layer of deformable material, e.g. sponge, foam, rubber pressing elements supported or backed-up by resilient material B29C66/8161
• CPC Class Codes: B29C 66/8161 said pressing elements being supported or backed-up by springs or by resilient material
• CPC Class Codes: B29C 66/82265 Eccentric mechanisms
• CPC Class Codes: B29C 66/8322 Joining or pressing tools reciprocating along one axis
• CPC Class Codes: B29K 2023/12 PP, i.e. polypropylene
• CPC Class Codes: B29K 2075/00 Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2875/00 Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as mould material
• CPC Class Codes: B29K 2995/007 Hardness
• CPC Class Codes: B65B 13/322 Friction welding
• CPC Class Codes: B65B 51/222 : by friction welding

Abstract

A METHOD AND APPARATUS FOR SECURING TOGETHER OVERLAPPING ENDS OF PLASTIC STRAPPING BY MEANS OF FRICTIONAL HEAT DEVELOPED AT THE INTERFACES OF THE OVERLAPPING ENDS. THE APPARATUS INVOLVES MEANS FOR TENSIONING A LENGTH OF STRAPPING ABOUT AN OBJECT, MEANS FOR SEVERING THE TENSIONED STRAP FROM A SUPPLY, MEANS FOR PRESSING OVERLAPPING END PORTIONS OF THE TENSIONED STRAP TOGETHER AND MEANS FOR RUBBING ONE OF THE ENDS AGAINST THE OTHER WITH AN ORBITAL MOTION.

Claims