Apparatus for perforating a moving web

Details Apparatus for perforating a moving web Apparatus for perforating a moving web

1978-08-04

1980-08-26

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

Electric arc-type devices

83 16, 131 15B, 219121EB, 162286, 264154, H05B 718

Patent

active

042197279

ABSTRACT:
In a ventilated cigarette making system the tipping paper is perforated before assembly of the cigarettes using a spark perforator which is controlled by a feedback arrangement, in response to the resultant air permeability of the finished cigarettes, or the permeability of the tipping paper as monitored before assembly. Preferably the testing of the finished cigarettes is done in a modified Molins "CID 4" cigarette testing device. The averaged test signal is used to control the frequency of power supply to the spark perforator, whose electrodes are loaded with capacitors so that the change in frequency results in a change in the current flow through the electrodes, and thus the size of the holes produced.

REFERENCES:
patent: 2678373 (1954-05-01), Suran
patent: 2763759 (1956-09-01), Mito et al.
patent: 3198934 (1965-08-01), Dubilier
patent: 3385951 (1968-05-01), Bancroft et al.
patent: 3622751 (1971-11-01), Larive et al.
patent: 4025752 (1977-05-01), Whitman

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