United States Patent 2493439
US Patent References:
/0130140.html
- - 0130140
/0597929.html
- - 0597929
Process of making rubber articles having cores and apparatus therefor
- - 1387805
Method of forming celluloid articles
- - 1737874
Method of molding plastic layers
- - 2345112
/0130140.html
- - 0130140
/0597929.html
- - 0597929
Process of making rubber articles having cores and apparatus therefor
- - 1387805
Method of forming celluloid articles
- - 1737874
Method of molding plastic layers
- - 2345112
Publication Date:
01/03/1950
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Primary Class:
Other Classes:
264/DIG.050, 264/DIG.078, 425/388, 264/509
International Classes:
B29C49/00; B29C51/10; B29C51/42; B41M1/24; B29C51/26; B41M1/00
US Patent References:
| 2377946 | Method of and apparatus for shaping thermoplastic sheets |