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:
Dec. 31, 1991
Filed:
May. 21, 1990
Naoya Sasaki, Ibaraki, JP;
Masataka Kawauchi, Ishioka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A medium transferring apparatus which makes use of a preliminary transference stage prior to a main transference stage at the time of transference of a medium such as a sheet of paper. In the former stage, an initial parameter setting operation is performed so that a desired amount of feeding of the medium and control parameters for achieving this feed amount, including the amount of control rotation, rotational speed and acceleration on starting of a transferring motor are automatically determined on the basis of external factors used as parameters such as the number of operations of the transferring apparatus, the type of the medium and desired environmental factors of use of the apparatus including temperature and humidity. In the initial parameter setting operation, an unknown friction coefficient of the medium is determined. In the main transference stage, data thereby obtained enables the medium to be transferred with constant accuracy no matter what the thickness, difference in level, friction coefficient of the medium, as well as environmental factors.