Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For extrusion or injection type shaping means
Reexamination Certificate
2007-12-18
2007-12-18
Davis, Robert (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
For extrusion or injection type shaping means
C425S133500, C425S188000, C425S462000
Reexamination Certificate
active
11184948
ABSTRACT:
An extrusion head device in which fixed and movable head parts as a plurality of separate parts can be easily combined using compact fastening means. Fastening cylinder rods provided for the fixed head part of the extrusion head device including the fixed and movable head parts are expanded, whereby fore-end locking portions at tips of the fastening cylinder rods are inserted into through holes of engaging blocks provided for the movable head to be protruded from upper surfaces of the engaging blocks; stopper-operating cylinder rods provided for the movable head part are expanded, whereby U-shaped stoppers at tips of the stopper-operating cylinder rods are inserted into clearances between the locking portions and the engaging blocks; and then the fastening cylinder rods are contracted, whereby the movable and fixed head parts are brought into tight contact with each other and fastened together.
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patent: 4824353 (1989-04-01), Hirschkorn
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patent: 2609261 (1988-06-01), None
Davis Robert
Leyson Joseph
The Yokohama Rubber Co. Ltd.
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