INSULATED HEAT PACKS

• US 3,663,335 A
• Filed: 11/20/1969
• Issued: 05/16/1972
• Est. Priority Date: 11/20/1969
• Status: Expired due to Term

• Current Assignee: Smith Fiberglass Products, Inc.
• Original Assignee: Richard E. Sheedy
• Inventors: Sheedy, Richard E.
• Primary Examiner(s): Borchelt, Benjamin A.
• Assistant Examiner(s): Devitt, J. J.
• Application Number:
  US04/878,453
• Time in Patent Office: 908 Days
• Field of Search: 156/381,380,583,499 29/498.5
• US Class Current: 156/499
• CPC Class Codes: B23K 1/0006 Exothermic brazing
• CPC Class Codes: B29C 65/022 Particular heating or welding methods not otherwise provided for
• CPC Class Codes: B29C 65/18 using heated tools
• CPC Class Codes: B29C 65/28 Flame or combustible material
• 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 66/5221 for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
• CPC Class Codes: B29C 66/73941 characterised by the materials of both parts being thermosets
• CPC Class Codes: B29C 66/91411 of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
• CPC Class Codes: B29C 66/91443 following a temperature-time profile B29C65/38 takes precedence
• CPC Class Codes: B29C 66/91951 in explicit relation to time, e.g. temperature-time diagrams
• CPC Class Codes: F16L 47/02 Welded joints; Adhesive joints
• CPC Class Codes: F24V 30/00 Apparatus or devices using heat produced by exothermal chemical reactions other than combustion

Abstract

A heat source assembly for use in adhesively joining together thermosetting resin impregnated members. A heat source consisting of a combustible material is enclosed in a non-combustible insulation which moderates the flow of heat to the joint area and also prevents rapid cooling to maintain uniform heating temperatures. The aforementioned abstract is neither intended to define the invention of the application which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.

Claims

1. A heat pack for use in adhesively joining together a pair of contiguous members employing a thermocuring resin adhesive interposed between the members, comprising:

a. an elongated combustible fuel element;

b. a non-combustible insulating mass surrounding said fuel element whereby at least a portion of the insulating mass is interposed between the said fuel element and at least the nearer one of the contiguous members;

c. a flexible cover member surrounding said non-combustible mass, at least a portion of said cover member being formed of a flexible metal heat conductive sheet; and

d. means to clamp said heat pack to the members to be adhesively joined.

2. The heat pack of claim 1 including a metallic foil wrapper surrounding the said insulating mass.