Foot warming heating element and method of manufacturing...

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

Reexamination Certificate

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Details

C428S195100, C428S206000, C428S320200, C428S343000, C428S354000, C126S263010, C126S263020, C156S145000, C156S250000

Reexamination Certificate

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07611767

ABSTRACT:
There is provided such a heat-generating body for warming a foot in that a heat-generating composition is used that can retain the shape thereof irrespective of the pressure inside the container bag upon using by application to a foot, a footgear or a sock. The heat-generating body of the invention for warming a foot is characterized in that it contains a heat-generating formed article causing a heat-generating reaction in the presence of air and having a shape retaining degree of 70 or more charged in a container bag constituted with a base material, a covering material and the like. Further a process is provided for producing a heat-generating body for warming a foot in that the heat generation reaction of the heat-generating composition is suppressed to prevent loss due to the heat-generating reaction during production, quality deterioration of the heat-generating composition, and other problems.

REFERENCES:
patent: 5046479 (1991-09-01), Usui
patent: 5084986 (1992-02-01), Usui
patent: 5879378 (1999-03-01), Usui
patent: 6264681 (2001-07-01), Usui
patent: 6436128 (2002-08-01), Usui
patent: 6915798 (2005-07-01), Minami
patent: 2001/0023366 (2001-09-01), Usui
patent: 2002/0121624 (2002-09-01), Usui
patent: 2004/0149732 (2004-08-01), Usui et al.
U.S. Appl. No. 10/450,521, filed Jun. 19, 2003, Usui et al.

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