Method of vacuum timing control

Package making – Methods – Filling preformed receptacle and closing


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53266A, 13762415, 1376242, B65B 4300




A method for selectively adjusting the duration of vacuum application to various stations of an insertion machine which ultimately inserts insertion material into an envelope.

patent: 2325455 (1943-07-01), Williams
patent: 2530622 (1950-11-01), Maris
patent: 2857964 (1958-10-01), Vore
patent: 3211179 (1965-10-01), Lilly et al.
patent: 3465499 (1969-09-01), Nelson et al.
patent: 3844551 (1974-10-01), Morrison
patent: 3913463 (1975-10-01), Hollis
patent: 4090532 (1978-05-01), Story, Jr.
patent: 4159611 (1979-07-01), Russell


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