Sealing container cover and wall members

• US 3,095,112 A
• Filed: 12/11/1961
• Issued: 06/25/1963
• Est. Priority Date: 12/11/1961
• Status: Expired due to Term

• Current Assignee: Howard Primack, Meir Weinstein
• Original Assignee: Howard Primack, Meir Weinstein
• Inventors: MEIR WEINSTEIN, Primack, Howard
• Application Number:
  US04/158,364
• Time in Patent Office: 561 Days
• US Class Current: 220/613
• CPC Class Codes: B29C 65/342 comprising at least a single wire, e.g. in the form of a winding
• CPC Class Codes: B29C 65/3432 comprising several wires, e.g. in the form of several independent windings B29C65/3436, B29C65/344 take precedence
• CPC Class Codes: B29C 65/3444 being a ribbon, band or strip
• CPC Class Codes: B29C 65/348 with a polymer coating
• CPC Class Codes: B29C 65/3492 being carbon
• CPC Class Codes: B29C 65/362 comprising at least a single wire, e.g. in the form of a winding
• CPC Class Codes: B29C 65/3632 comprising several wires, e.g. in the form of several independent windings B29C65/364 takes precedence
• CPC Class Codes: B29C 65/3676 being metallic
• CPC Class Codes: B29C 65/368 with a polymer coating
• CPC Class Codes: B29C 65/3684 being non-metallic
• CPC Class Codes: B29C 65/4815 Hot melt adhesives, e.g. thermoplastic adhesives
• CPC Class Codes: B29C 65/4875 being spherical, e.g. particles or powders
• CPC Class Codes: B29C 65/5035 being in thread form, i.e. in the form of a single filament, e.g. in the form of a single coated filament
• CPC Class Codes: B29C 65/7829 said distance pieces being integral with at least one of the parts to be joined
• CPC Class Codes: B29C 66/12445 having the tongue on the side
• CPC Class Codes: B29C 66/542 joining hollow covers or hollow bottoms to open ends of container bodies
• CPC Class Codes: B65B 51/10 Applying or generating heat or pressure or combinations thereof welding of plastics per se B29C65/02; closing plastic tube ends in general B29C57/10
• CPC Class Codes: B65B 7/2878 by heat-sealing
• CPC Class Codes: Y10S 228/903 Metal to nonmetal

Claims

1. A METHOD OF SEALING COVER AND WALL MEMBERS OF A CONTAINER WHICH COMPRISES PASSING CURRENT THROUGH AN ELECTRICALLY CONDUCTIVE ELEMENT IN CONTACT WITH THERMOPLASTIC MATERIAL CONTAINING PARTICULATE THERMALLY SENSITIVE BLOWING AGENT, SAID THERMOPLASTIC MATERIAL BEING POSITIONED WHERE COVER AND WALL MEMBERS ARE TO BE SEALED WHEREBY THE HEAT GENERATED THROUGH POWER LOSS IN SAID ELECTRICALLY CONDUCTIVE ELEMENT CAUSE MELTING OF SAID THERMOPLASTIC MATERIAL WHICH UNDER GASEOUS PRESSURE DEVELOPED BY SAID THERMALLY SENSITIVE BLOWING AGENT FLOWS TO PRODUCE A BOND BETWEEN SAID MEMBERS WHEN THE CURRENT IS STOPPED AND THE GENERATED HEAT IS DISSIPATED.