Pressing method, pressing mechanism and resin molding device

Details Pressing method, pressing mechanism and resin molding device Pressing method, pressing mechanism and resin molding device

2005-02-08

2005-02-08

Ostrager, Allen (Department: 3725)

Presses

Methods

C100S269010, C072S453180, C060S545000, C060S581000

Reexamination Certificate

active

06851355

ABSTRACT:
The pressing method includes the first step of displacing a sub-piston provided within a sub-cylinder from its initial position to press working fluid such that the working fluid is introduced via a check valve into a main cylinder to displace a main piston provided therein, and the second step of causing the sub-piston to return to the initial position such that the working fluid is supplied to the sub-cylinder. The first and second steps are repeated successively until the working fluid in the main cylinder attains a prescribed pressure level. With this method, variation in the way of pressing an object is alleviated, contamination due to the working fluid is prevented, and downsizing of the pressing mechanism is enabled.

REFERENCES:
patent: 2382045 (1945-08-01), Flowers
patent: 5095725 (1992-03-01), Wada et al.
patent: 5161865 (1992-11-01), Higashimata et al.
patent: 60-177897 (1985-09-01), None
patent: 08 078454 (1996-03-01), None
patent: 11-179600 (1999-07-01), None
patent: 2000031178 (2000-01-01), None
Translation copy of Japan utility patent No. 60-177897 A.

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