KNITTED ANTI-STATIC AND FLAME-RETARDANT BLANKET

• US 3,806,959 A
• Filed: 03/13/1972
• Issued: 04/30/1974
• Est. Priority Date: 03/13/1972
• Status: Expired due to Term

• Current Assignee: Irving Gross
• Original Assignee: Irving Gross
• Inventors: Gross, Irving
• Primary Examiner(s): Nunberg, Casmir A.
• Application Number:
  US05/234,067
• Time in Patent Office: 778 Days
• Field of Search: 66/192,193,195,202 3/333,334R,335,336 297/DIG.5
• US Class Current: 5/482
• CPC Class Codes: D04B 21/16 incorporating synthetic threads
• CPC Class Codes: D10B 2401/16 antistatic; conductive
• CPC Class Codes: Y10S 297/05 Fireproof

Abstract

A knitted thermal blanket constituted of a material which is made of a combination of flame retardent synthetic yarns and flame retardent synthetic yarns containing a selected percentage of metal fibers that is selectively placed throughout the material either in the warp, the filling, or in both. The flame retardent synthetic yarn and metal combination is attained by spinning the synthetic fiber and metal fibers into a yarn and this yarn in the proper percentage needed is introduced into the fabric. The fabric is knitted in a manner whereby additional ties and knots hold the metal tighter and this prevents loss of the same during repeated washings of the material.

Claims

1. A knitted anti-static thermal blanket comprising a combination of flame retardent synthetic yarn staple fiber, and a blended yarn containing a synthetic fiber and a plurality of metal fibers so distributed in said fabric to render the same conductive throughout and to dissipate any electric charge therein, said metal fibers having a weight relative to said knitted thermal blanket of approximately 0.10 to 2 percent whereby said knitted thermal blanket has both flame retardent and anti-static properties, said blanket being so knitted that said metal fibers are firmly held therein and during repeated washings of said blanket the loss of metal fibers therein is materially reduced.

2. A knitted thermal blanket as claimed in claim 1 wherein the warp ends are knitted in a chain stitch which functions to lock the corners and having additional ties and knots whereby said additional ties and knots in said knitted thermal blanket hold said metal fibers therein.

3. A knitted thermal blanket as claimed in claim 2 wherein two plain warp ends of synthetic yarn staple fiber are twisted in at least one yarn end to form a multi-ply yarn.

4. A knitted thermal blanket as claimed in claim 1 wherein said yarn containing said metal fibers is inserted in the filling material.

5. A knitted thermal blanket as claimed in claim 1 wherein a portion of said yarn containing said metal fibers is twisted with at least one end of said synthetic yarn to form the warp and the other portion of said yarn containing said metal fibers is inserted in the filling material.

6. A knitted thermal blanket as claimed in claim 1 wherein each row of the layed in filling touches said blended yarn containing said metal fibers.

7. A knitted thermal blanket as claimed in claim 1 wherein said synthetic fiber is blended with another yarn.

8. A knitted thermal blanket as claimed in claim 7 wherein said other yarn is cotton.