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US 4,064,726 AGranted
Method of manufacturing pressure pots having a bayonet catch, and apparatus for carrying out such method
OwnerDietrich Hinzeinventor
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OwnerDietrich Hinzeinventor
Estimating the term…
A method and apparatus for manufacturing pressure pots having a rim with bayonet cams on its undersurface includes a spinning operation to fold over the rim and to simultaneously form the bayonet cams. More specifically, the pot is held inside a chuck having an annular cam profile facing the underside of the rim and spinning rollers engage the upper face of the rim and fold over the rim increasing its thickness and forcing the metal in the rim to comform to the cam profile. The rim is confined on its radially outward side by an axially shiftable retaining ring and is confined on its radially inward side by a counterholder cylinder. After folding over of the rim, the upper face of the rim is formed by machining or the like which may remove the metal between adjacent bayonet cams.
A method of manufacturing pressure cooking pots having a cylindrical wall and an upper radially outwardly projecting rim having underlying cam surfaces for cooperation with a lid structure for the pot, said method comprising the steps of:
An apparatus for making pressure pots having a cylindrical wall, a bottom wall and an upper rim having cam surfaces formed in the under face of the rim, said apparatus including a rotatable chuck for receiving the pot,
Dependencies are inferred from the claim text.