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. 21, 1997
Filed:
Oct. 16, 1995
Eric A Belec, Southbury, CT (US);
Eric J Janatka, Danbury, CT (US);
Shahzad H Malick, Fairfield, CT (US);
Rebecca J Pritting, Pawling, NY (US);
Pitney Bowes Inc., Stamford, CT (US);
Abstract
Apparatus for transporting a web of paper having tractor holes along only one margin thereof. The apparatus includes: a tractor drive having a first pair of pulleys and a first belt mounted on the first pair of pulleys, the first belt having a plurality of sprockets for engaging the paper tractor holes; and an auxiliary vacuum drive system for engaging the marginal portion of the web of paper without tractor holes, the auxiliary drive system having (a) a second pair of pulleys and a second belt mounted on the second pair of pulleys, the second belt having a plurality of apertures at equally spaced intervals extending longitudinally of the length of the second belt, the second belt having an upper and lower reach, (b) a device for applying a vacuum to the apertures in the upper reach of the second belt, (c) a device for varying the amount of vacuum applied and (d) a device for driving the upper reach of the second belt at about the same linear velocity as the linear velocity of the tractor drive sprockets, whereby the vacuum can be turned off during constant velocity or deceleration motions of the web, thereby dissipating tolerance build-up between the tractor drive and the auxiliary vacuum drive system.