Glass-made lid for a cooking pan and the like and a method of manufacture thereof

A method of manufacturing a glass-made lid for a kitchen pan, pot, and the like, comprising the steps of:

• providing a sheet glass previously cut to a suitable round shape for forming a glass lid, said sheet glass including a peripheral edge to be formed to a particular shape and being supported on its axis, and providing thermally-resistant forming roller means adjacent to said sheet glass, said forming roller means including a peripheral recess of said particular shape on the side facing said sheet glass;
• heating said peripheral edge of said sheet glass to any required softening temperature and thereby allowing the same to soften;
• engaging said peripheral recess of said forming roller means with said peripheral edge in its softened state of said glass sheet and causing the relative rotary motion of said sheet glass and said forming roller means with regard to each other, thereby forming said peripheral edge of said sheet glass to conform to said particular shape of said peripheral recess of said forming roller means by forcing said forming roller means to press said peripheral edge toward said sheet glass:
• engaging thermally-resistant dual-roll nipping roller means with said formed peripheral edge of said sheet glass, and forcing one of the two rolls of said nipping roller means to press said formed peripheral edge of said glass sheet between said two rolls in the direction of the width of said peripheral edge;
• and
• forming said sheet glass to a curved-surface by heating and shaping the same.