发明授权
US5562399A Automatic mail stacker 失效
自动邮件堆垛机

Automatic mail stacker
摘要:
A stacker for stacking paper documents seriatim is disclosed. The stacker includes: a platform, a helix extending upwardly from the platform; and a device for rotating the helix, whereby a paper document placed at the bottom of the helix can be driven upwardly to the top of the helix.
公开/授权文献
信息查询
0/0