×

Process for forming hydratable, flexible refrigement media

  • US 5,628,845 A
  • Filed: 09/28/1995
  • Issued: 05/13/1997
  • Est. Priority Date: 09/28/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. Apparatus for producing a continuous composite fabric sheet having discrete cells, each cell containing a measured volume of a superabsorbent polymer media, comprising:

  • (a) means for continuously feeding a thermo-formable sheet of media from a supply roll of such media;

    (b) means for dispensing a measured quantity of a superabsorbent polymer media onto an upper surface of said sheet in discrete units spaced transversely and longitudinally on said sheet;

    (c) means for continuously supplying a sheet of permeable fabric media from a supply roll of such media in horizontally aligned juxtaposition superjacent said thermo-formable sheet with said discrete units of said polymer media therebetween;

    (d) means for maintaining a predetermined tension on said permeable and thermo-formable sheet to prevent dissipation of said polymer from said units;

    (e) a heated pattern roller having a raised intersecting pattern formed on the surface thereof and a means for providing precise heat control thereto, said heated pattern defining individual cell dimensions associated with each of said units said pattern roller mounted for rotation about a first axis transverse to said sheets such that said sheets are carried on said pattern roll over a portion of said rotation;

    (f) pressure roller means for applying a predetermined pressure to said sheets against said pattern roll such that said fabric sheet and said thermo-formable sheet are integrated by thermal bonds formed along said pattern to form a composite sheet with said superabsorbent polymer confined within cells defined by said thermal bonds;

    (g) means for controlling the temperature differential between said heated pattern roller and said pressure roll means; and

    ,(h) means for controlling the rate of feed and supply of said sheets over said pattern roll.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×