Platen

It can be a flat metal (or earlier, wooden) plate pressed against a medium (such as paper) to cause an impression in letterpress printing.

In office copiers and scanners, the platen is a flat glass surface on which operators place papers or books for scanning.

This allows the garment to effectively become a rigid immobile substrate, especially important when printing multiple colors or utilizing an on-press infrared dryer.

[4] In manufacturing, a platen is a flat plate of a press utilized in laminate, plastic and forest product industries.

A platen is typically heated with oil, water, steam or electricity and is used in the production of furniture, tires, gaskets, particle board, composite heaters and plywood.

Section of a platen printing press in use. The platen is the sturdy plate which applies the pressure to the paper and type.
Copier
A planar in semiconductor wafer polishing