ELECTRIC BLANKET AND METHOD OF FORMING SAME

• US 3,745,301 A
• Filed: 11/12/1971
• Issued: 07/10/1973
• Est. Priority Date: 11/12/1971
• Status: Expired due to Term

• Current Assignee: Field Crest Cannon Incorporated
• Original Assignee: Ernest Kohn Sherrill, James M. Hall, Ralph G. Barnard
• Inventors: Sherrill, Ernest Kohn, Hall, James M., Barnard, Ralph G.
• Primary Examiner(s): Albritton, C. L.
• Application Number:
  US05/198,109
• Time in Patent Office: 606 Days
• Field of Search: 219/211,212,529 156/291,290 161/148
• US Class Current: 219/212
• CPC Class Codes: H05B 2203/003 using serpentine layout
• CPC Class Codes: H05B 2203/014 Heaters using resistive wires or cables not provided for in H05B3/54
• CPC Class Codes: H05B 2203/017 Manufacturing methods or apparatus for heaters
• CPC Class Codes: H05B 3/342 heaters used in textiles

Abstract

An electrically heated blanket and method of forming the same in which two layers of textile fabric are interconnected along spaced parallel lines by rows of small discrete dots of adhesive material to form a series of dividers with adjacent dividers defining parallel open-ended channels therebetween in which electric heating wire is positioned.

Claims

1. An electrically heated blanket comprising two layers of textile fabric interconnected throughout major portions thereof along a series of spaced parallel lines by discontinuous adhesive material to form a series of dividers with adjacent dividers defining parallel channels therebetween, with opposite ends of the channels being unobstructed and open-ended, and electric heating wire positioned in said channels.

2. An electrically heated blanket comprising two layers of textile fabric interconnected throughout major portions thereof along a series of spaced parallel lines by rows of small discrete dots of adhesive material to form a series of dividers with adjacent dividers defining parallel channels therebetween, with opposite ends of the channels being unobstructed and open-ended, and electric heating wire positioned in said channels.

3. An electrically heated blanket according to Claim 2, wherein each of said fabric layers comprises a needled nonwoven web of staple fibers forming an outer face thereof.

4. An electrically heated blanket according to claim 2, wherein each of said fabric layers comprises an outer web of staple fibers, an inner web of crimped continuous synthetic filaments, and needled fiber entanglements uniting the respective webs of each fabric layer together.

5. An electric blanket shell comprising two layers of textile fabric interconnected throughout major portions thereof along a series of spaced parallel lines by discontinuous adhesive material to form a series of adjacent dividers defining parallel channels therebetween, with opposite ends of the channels being unobstructed and open-ended and adapted to receive electric heating wire therein.

6. An electric blanket shell comprising two layers of textile fabric interconnected throughout major portions thereof along a series of spaced parallel lines by rows of small discrete dots of adhesive material to form a series of dividers with adjacent dividers defining parallel channels therebetween, with opposite ends of the channels being unobstructed and open-ended to receive electric heating wire therein.

7. A blanket shell according to claim 6, wherein each divider comprises a plurality of rows of said dots of adhesive material.

8. A blanket shell according to claim 6, wherein said dots of adhesive in each divider are arranged in staggered relationship.

9. A blanket shell according to claim 6, wherein each of said dots of adhesive is a cured acrylic adhesive material.

10. A blanket shell according to claim 6, wherein each of said dots of adhesive is a cured polyvinyl acetate-acrylic copolymer adhesive material.

11. A blanket shell according to claim 6, wherein each of said dots is largely disposed between the fabric layers and only superficially penetrates into the fabric layers.

12. A blanket shell according to claim 6, including rows of discrete dots of adhesive material spaced outwardly from and extending parallel with said series of dividers and bonding opposing side edge portions of said layers together and extending substantially from one end to the opposite end of said shell.

13. A blanket shell according to claim 6, wherein at least most of said dividers are arranged relative to each other with their ends in staggered relationship.

14. A blanket shell according to claim 6, wherein each of said fabric layers comprises a needled nonwoven web of staple fibers forming an outer face thereof.

15. A blanket shell according to claim 6, wherein each of said fabric layers comprises an outer web of staple fibers, an inner web of crimped continuous synthetic filaments, and needled fiber entangelments uniting the respective webs of each fabric layer together.