Machine tool with protective light curtain and work stock holdin

Details Machine tool with protective light curtain and work stock holdin Machine tool with protective light curtain and work stock holdin

1977-02-01

1978-01-31

Schran, Donald R.

Cutting

With work immobilizer

Means to clamp work

83DIG1, 83 58, 192130, B26D 702, B26D 724

Patent

active

040709400

ABSTRACT:
A shear machine having a blade for cutting successive increments of material from flat sheet work stock has a cutting zone guarded by a curtain of light. Photosensitive means actuates a brake to stop blade motion if an object extends through the light curtain towards the cutting zone. Hold-down mechanism is operated by a lever or the like situated outside of the guarded region to enable the final portion of a sheet of work stock to be manually held in place at the cutting zone without penetrating the light curtain. The plane of the light curtain inclines towards the front of the shear machine enabling the hold-down mechanism control lever or the like to be situated on the machine above the cutting zone where it may be reached without interception of the light curtain by the operator.

REFERENCES:
patent: 1958128 (1934-05-01), Cate
patent: 2058668 (1936-10-01), Davis
patent: 2241556 (1941-05-01), Mac Millin et al.
patent: 2963627 (1960-12-01), Buchsbaum

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