Patent ID: 7540314

Claim:
A heat press plate for manufacturing a plastic card by welding a plurality of collated and layered card component sheets, said heat press plate comprising: a pair of upper and lower plate members; a circular sealing member disposed between said pair of plate members and defining a storing section for storing said card component sheets; an exhaust passage, one end of which faces said storing section and another end of which faces outside of said plate members; a check valve apparatus connected to the another end of said exhaust passage and inhibiting outside air from entering said storing section; and two or more positioning pins disposed vertically in said storing section and respectively passing through two or more reference holes formed at corresponding positions in each of said plurality of card component sheets, wherein, said positioning pins includes a first positioning pin having substantially the same shape as at least one of said plurality of reference holes, and a second positioning pin having a smaller sectional area than at least one of the remaining reference holes.