Patent · US Expired

Sheet stacking apparatus having positive control system for trailing sheet ends

US4903956A · kind A · utility

9Cited by

10References

2Claims

0Family size

Inventors

David J. Stephens · Dayton, US
Rodney G. Mader · Springfield, US
Homer D. Durst · Springfield, US
Sven Sonnenberg · Springfield, US

Key dates

Filing date	Oct 31, 1988
Grant date	Feb 27, 1990
Priority date	—
Expiry date	Oct 31, 2008

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB65H29/40
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

A sheet stacking apparatus for receiving sheets from a printing or copying machine includes guide structure for directing output sheets onto an elevator platform and a selectively rotatable shaft having paddle arms disposed at a 108.degree. interval. The shaft rotation is controlled so that the arms guide a sheet during stacker input and then rotates 360.degree. to positively clear the sheet trail edge from the stacker input path.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.