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:
Mar. 13, 2001
Filed:
Jul. 02, 1997
Masao Fukuda, Shiga, JP;
Ishida Co., Ltd., , JP;
Abstract
A pair of pull-down belts pulls longitudinally a tubularly formed elongated bag-making film along a filling cylinder of a bag maker-packaging machine. A pair of members supporting the pull-down belts can move towards or away from each other depending on the size of the former, and elastic springs for providing each of the pull-down belts with a force which depends on their relative positions with respect to the corresponding belt-supporting members. An adjustment motor moves the pull-down belts initially to specified reference positions separate from the tubularly formed film and therefrom towards the filling cylinder. The distance traveled by the pull-down belts from their reference positions towards the filling cylinder is monitored. The distance by which the pull-down belts must be moved for each of different kinds of former is measured and stored in a memory device. Thus, whenever a particular former is selected and installed, the pull-down belts can be automatically moved to optimum positions for pulling down the film effectively by controlling the adjustment motor.