초록 ▼

An improved form of vacuum press is disclosed for use in laminating transparent protective film to photographs and the like and for dry-mounting the same to suitable substrates or backing materials. The press comprises a rigid work support assembly for supporting a workpiece, and a cover assembly hi

An improved form of vacuum press is disclosed for use in laminating transparent protective film to photographs and the like and for dry-mounting the same to suitable substrates or backing materials. The press comprises a rigid work support assembly for supporting a workpiece, and a cover assembly hinged to the work support assembly for movement into and out of engagement with the top of the work support assembly, with the cover assembly comprising a frame, a flexible, air-impermeable membrane extending across an interior opening in the frame and attached thereto at its edges, and sealing means for forming an airtight chamberbetween the work support assembly supporting the workpiece and the cover assembly when the cover assembly is in engagement with the top of the work support assembly. The press also includes evacuating means for removing substantially all the air from the airtight chamber and causing the flexible membrane to collapse under the force of outside atmospheric pressure so as to effectively compress the workpiece within the chamber, and heating and cooling means for selectively heating and cooling the workpiece while under pressure.

대표청구항 ▼

A vacuum press comprising: a work support assembly including a substantially rigid surface for supporting a workpiece; a cover assembly disposed above and hingedly connected to said work support assembly so as to be movable into and out of engagement with said work support assembly, said cover assem

A vacuum press comprising: a work support assembly including a substantially rigid surface for supporting a workpiece; a cover assembly disposed above and hingedly connected to said work support assembly so as to be movable into and out of engagement with said work support assembly, said cover assembly comprising a frame defining an opening, a pliable, air-impermeable sheet extending across said opening and secured at its edges to said frame, and electrical heater means for heating said workpiece disposed within said opening above said pliable sheet; means carried by said cover assembly for sealing together said work support assembly and said cover assembly when mutually engaged so as to provide an airtight chamber between said surface and said pliable sheet; means for evacuating said chamber so that the atmospheric pressure exterior of said chamber will force said pliable sheet towards said surface and thereby compress a workpiece supported on said surface; cooling means including a blower for circulating a flow of cool air through said cover assembly over said pliable sheet; control means for operating said electrical heater means, said evacuating means and said blower so that a workpiece captivated in said chamber may alternately be heated under compression and cooled under compression.