Chemical heating pad with differing air-admitting perforation sets for different heat-generation levels
First Claim
Patent Images
1. In a heating pad of the type having a particulate chemical mixture which is exothermically reactive in the presence of air and having first and second opposed panels forming an envelope which contains the mixture while admitting air, the improvement comprising:
- the first panel having a first body-contact surface and a first set of air-admitting perforations extending from the first body-contact surface to inside the envelope;
the second panel having a second body-contact surface and a second set of air-admitting perforations extending from the second body-contact surface to inside the envelope; and
the second set of perforations differing structurally from the first set of perforations thereby to provide different air-admission properties supporting differing reaction characteristics,whereby two different heat conditions may be applied to the human body by the two body-contact surfaces with the opposite body-contact surfaces exposed to the atmosphere.
1 Assignment
0 Petitions
Accused Products
Abstract
A heating pad of the type having a particulate chemical mixture, which is exothermically reactive in the presence of air, and a pair of opposed panels forming an envelope containing the mixture and admitting air to support the reaction. Differing perforation sets in the opposed panels allows the pad to generate two levels of heat and allows opposed body-contact surfaces of the pad to apply two different heat conditions to the human body.
-
Citations
19 Claims
-
1. In a heating pad of the type having a particulate chemical mixture which is exothermically reactive in the presence of air and having first and second opposed panels forming an envelope which contains the mixture while admitting air, the improvement comprising:
-
the first panel having a first body-contact surface and a first set of air-admitting perforations extending from the first body-contact surface to inside the envelope; the second panel having a second body-contact surface and a second set of air-admitting perforations extending from the second body-contact surface to inside the envelope; and the second set of perforations differing structurally from the first set of perforations thereby to provide different air-admission properties supporting differing reaction characteristics, whereby two different heat conditions may be applied to the human body by the two body-contact surfaces with the opposite body-contact surfaces exposed to the atmosphere. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification