Cutting – Processes – Including stacking of plural workpieces
Patent
1988-12-21
1992-04-14
Phan, Hien H.
Cutting
Processes
Including stacking of plural workpieces
83 39, 83452, 83 94, 83697, 83929, 8346874, B23D 2300, B26D 300
Patent
active
051037025
ABSTRACT:
Venetian blind slats are stacked and clamped onto a support, and confined laterally, while leaving ends beyond the desired length to which they are to be cut, un-confined. Then in one stroke in a direction perpendicular to the support, the ends of the stack are sheared-off by a punching tool having a cutting edge which contacts longitudinal margins prior to the center of the slats.
REFERENCES:
patent: 1474048 (1923-11-01), Lynch
patent: 1647254 (1927-11-01), Simmons
patent: 2936665 (1960-05-01), Naffin
patent: 3370492 (1968-02-01), Treff
patent: 3677117 (1972-07-01), Cutter
patent: 3799022 (1974-03-01), Nagel et al.
patent: 4790226 (1988-12-01), Tsuchida
patent: 4823449 (1989-04-01), Chang
patent: 4907325 (1990-03-01), Hsu
patent: 4932301 (1990-06-01), Buck
Levolor Lorentzen, Inc.
MacDonald Thomas S.
Phan Hien H.
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