METHOD AND APPARATUS FOR BONDING THERMOPLASTIC SHEET MATERIALS

• US 3,505,136 A
• Filed: 09/19/1966
• Issued: 04/07/1970
• Est. Priority Date: 09/19/1966
• Status: Expired due to Term

• Current Assignee: John G. Attwood
• Original Assignee: John G. Attwood
• Inventors: Attwood, John G.
• Application Number:
  US04/580,529
• Time in Patent Office: 1,296 Days
• US Class Current: 156/73.1
• CPC Class Codes: B29C 65/04 Dielectric heating, e.g. high-frequency welding , i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
• CPC Class Codes: B29C 65/08 using ultrasonic vibrations non-plastics element to plastics elements B29C65/645
• CPC Class Codes: B29C 65/081 having a component of vibration not perpendicular to the welding surface
• CPC Class Codes: B29C 65/7873 using cooperating conveyor belts or cooperating conveyor chains B29C66/83423, B29C66/83523, B29C66/83533 take precedence
• CPC Class Codes: B29C 66/00441 movable, e.g. mounted on reels
• CPC Class Codes: B29C 66/02 Preparation of the material, in the area to be joined, prior to joining or welding B29C66/32 takes precedence
• CPC Class Codes: B29C 66/0222 without removal of material, e.g. cleaning by air blowing or using brushes
• 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 66/43121 Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags closing tube ends B29C57/10
• 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 66/7373 Joining soiled or oxidised materials
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29C 66/81422 being convex
• CPC Class Codes: B29C 66/8161 said pressing elements being supported or backed-up by springs or by resilient material
• CPC Class Codes: B29C 66/83423 cooperating bands or belts
• CPC Class Codes: B29C 66/836 Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table B29C66/65 takes precedence
• CPC Class Codes: B29C 66/849 Packaging machines
• CPC Class Codes: B29K 2023/06 PE, i.e. polyethylene
• CPC Class Codes: B29L 2031/7128 Bags, sacks, sachets tea bags B29L2031/7122; medical bags B29L2031/7148
• CPC Class Codes: B65B 51/225 by ultrasonic welding
• CPC Class Codes: Y10S 220/31 : Sonic seal

Claims