The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 1981
Filed:
Jan. 15, 1979
Anton Baier, Wentorf, DE;
Hauni-Werke Korber & Co. KG., Hamburg, DE;
Abstract
Apparatus for making holes in a running web of wrapping material for cigarettes or in a running web of uniting band material which connects filter plugs with plain cigarettes has one or more groups of series-connected electrode pairs whose electrodes are disposed at the opposite sides of the web. Several sources of high-voltage impulses transmit impulses seriatim to one electrode of the foremost electrode pair of each group whereby the resulting spark discharge across the gaps between the electrodes of each pair entails the formation of holes. The size and/or the number of holes can be varied in order to ensure that the permeability of each unit length of the web will equal or approximate a selected value, by changing the frequency of application of high-voltage impulses or by changing the number of series-connected electrode pairs. The polarity of impulses is reversed, either regularly or at random intervals, in order to remove scraps of paper which accumulate at the tips of the electrodes. The electrode pairs of each group are staggered, as considered transversely and/or in the longitudinal direction of the web.