Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Reexamination Certificate
1998-10-16
2001-01-30
Walsh, Donald P. (Department: 3653)
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
26, C700S124000
Reexamination Certificate
active
06179189
ABSTRACT:
BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates to a control device of a continuous material feed device to be installed in a press, more specifically to a continuous material feed device such as a gripper feed, a roll feed or a roll gripper.
(2) Description of the Prior Art
In general, a continuous material feed device (in this specification, excluding a transfer device) to be installed in a press is so constituted that a continuous material (in this specification, comprising a series of wire rod, coil material or band material including that as a secondary machining material) is sent to a press intermittently.
In this connection, a novel continuous material feed device is being developed, which is such device that a linear motor is assembled in a continuous material feed device as above described.
Also such device is known that a servo motor is assembled in a continuous material feed device.
SUMMARY OF THE INVENTION
An object of the present invention is to improve the feeding accuracy in such a continuous material feed device in which a linear motor or a servo motor is assembled.
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Arent Fox Kintner
Pham Minh-Chau
Plotkin & Kahn PLLC
Walsh Donald P.
Yamada Dobby Co., Ltd.
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