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Slab gel dryer and method

  • US 4,020,563 A
  • Filed: 04/21/1975
  • Issued: 05/03/1977
  • Est. Priority Date: 04/21/1975
  • Status: Expired due to Term
First Claim
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1. An apparatus for dehydrating slab gels comprising a porous filter sheet for contacting the slab gel on one side thereof, an overlay sheet for contacting the slab gel on the other side thereof, said overlay sheet having a smooth non-porous surface thereby being nonadherent to the slab gel, a platen, said platen having a depression formed on one side having boundaries including a bottom with a predetermined area for receiving said overlay and porous filter sheets, a compliant cover overlaying said depression and having a size greater than said predetermined area, said depression having an opening through one boundary thereof, means for communicating a vacuum source with said opening for producing low pressure in said depression, means for uniformly supporting and for providing substantially uniform dispersal of said low pressure over the side of said porous filter sheet facing said bottom boundary, and a heater disposed on the other side of said platen, so that when the slab gel is placed between said overlay and porous filter sheets and disposed in said depression and low pressure is induced therein, ambient pressure forces said compliant cover against the periphery of said depression thereby providing a seal therebetween and said overlay sheet holds the slab gel firmly against said porous filter sheet, whereby moisture in the slab gel is vaporized by said heater and removed from said depression through said opening and the slab gel is fixed onto said porous filter sheet in a dehydrated condition.

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