Loose element sheet stacking assistance system
US5005821A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 2, 1990 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | May 2, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H31/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a sheet stacking system, especially for a printer or copier set complier, in which sheets are sequentially fed for stacking into a stacking tray to a stacking registration wall position, a sheet stacking assistance and control system is provided by partially supporting and rotating an endless weighted chain-like lose element member, e.g., a metal bead chain, from above the stacking tray, preferably by two spaced and commonly driven pulleys, so that a first chain portion continuously moves downwardly towards the stacking tray in the path of said sheets being fed in the stacking tray to help pull them down, and then the chain flexes so that a substantial second chain portion continuously lies on the top sheet being stacked and continuously drags it towards the registration position, and then desirably an immediately following third chain section is pulled through the registration wall and sharply arcuately dropped there below the stack top level to continuously drag down the sheet edges there. This device has the ability to accommodate a wide range of stack heights and the ability to compile large stacks without requiring adjustment of the complier tray.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.