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:
Nov. 20, 2001
Filed:
Jul. 20, 2000
Atsushi Ogata, Sunto-gun, JP;
Yasuyoshi Hayakawa, Mishima, JP;
Tsuyoshi Waragai, Mishima, JP;
Tomoyuki Araki, Numazu, JP;
Masayoshi Fukatsu, Shizuoka-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A sheet stacking device including a stacking tray for stacking and containing sheets, and a lifting and lowering device for moving the staking tray up and down. In this case, the lifting and lowering device includes a driving force converting device for changing the distance of moving the stacking tray as an input and output ratio with respect to a predetermined driving force from a driving source, and changing the elevating speed of the stacking tray according to the input and output ratio. The driving force converting device includes a suspension member for suspending the stacking tray and a winding member having a conical winding portion for winging the suspension member, and lifts and lowers the stacking tray by rotating the winding member, and the elevating speed of the stacking tray is changed according to the winding length of the suspension member, which is changed depending on the diameter difference of the winding portion.