Core means having a rubber liner

Details Core means having a rubber liner Core means having a rubber liner

1974-09-13

1977-01-18

Lazarus, Richard B.

Static molds

Including removable or movable liner

249153, 249179, 249183, B28B 736

Patent

active

040035450

ABSTRACT:
A core member used in a moulding flask for making prefabricated concrete products, comprising a hollow tubular member of predetermined size having all outer surfaces intended to be in contact with concrete mixture covered by a thin layer of rubber plate.

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patent: 744970 (1903-11-01), Miller
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patent: 795518 (1905-06-01), Lamp
patent: 799048 (1905-09-01), Head
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patent: 2261247 (1941-11-01), Girard
patent: 2865078 (1958-12-01), Hasselblad
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patent: 3437309 (1969-04-01), Tausanovitch
patent: 3458908 (1969-08-01), Burchett
patent: 3561079 (1971-02-01), Anderson

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