Top and bottom die assemblies for folding the edges of a non-rig

Details Top and bottom die assemblies for folding the edges of a non-rig Top and bottom die assemblies for folding the edges of a non-rig

1979-03-21

1981-04-28

Kee Chi, James

Boot and shoe making

Upper machines

Loose upper shaping

12146CK, 69 1, 493379, 493456, 493472, A43D 1100, C14B 100, B65H 4500

Patent

active

042636884

ABSTRACT:
Cooperating top and bottom die assemblies for use in a press to fold the edges of a non-rigid workpiece. The top die comprises a horizontal support plate having a radiused folding plate affixed to its underside. A spring biased stripper in association with the support plate is shiftable vertically relative thereto between a retracted position and a normal extended position below the radiused folding plate. The top die assembly support plate has a plurality of upstanding support posts on its upper surface together with means to affix the top die assembly to the upper platen of the press with the free ends of the upstanding support posts in abutment thereagainst. The bottom die assembly comprises a horizontal base plate adapted to rest on the bottom platen of the press. The base plate has a first set of downwardly depending hollow posts mounted on its underside to either side of the press bottom platen. This first set of posts is adapted to telescopically receive spring biased pins attached to a horizontal floating plate located above the base plate and shiftable by the top die assembly relative to the base plate between a normal position and a depressed position. The floating plate carries a male plug on its upper surface. The base plate has a second set of downwardly depending hollow post mounted on its underside to either side of the press bottom platen and adapted to telescopically receive spring biased pins attached to a horizontal cavity plate located above the floating plate. The cavity plate has a female cavity formed therein of such size and shape as to receive the male plug with close tolerance. The cavity plate is shiftable by the top die assembly relative to the base plate and the floating plate between a normal position and a depressed position.

REFERENCES:
patent: 1946999 (1934-02-01), Balsam
patent: 3024019 (1962-03-01), Ladenburger
patent: 3073141 (1963-01-01), Freeman, Jr.
patent: 3382687 (1968-05-01), Freeman, Jr.
patent: 3753831 (1973-08-01), Copithorne
patent: 3823935 (1974-07-01), Guichard
patent: 4051569 (1977-10-01), Freeman et al.

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