Sheet feeding or delivering – Delivering – With transfer means between conveyor and receiver
Reexamination Certificate
1999-12-30
2001-10-02
Ellis, Christopher P. (Department: 3651)
Sheet feeding or delivering
Delivering
With transfer means between conveyor and receiver
C271S187000, C271S265010, C198S404000
Reexamination Certificate
active
06296246
ABSTRACT:
FIELD AND BACKGROUND OF THE INVENTION
This invention relates to a method and an apparatus for accurately manipulating at least one sheet.
In machines that manipulate sheets, such as paper documents, it is often necessary to bring sheets from a movement into a predetermined orientation or position with a particular speed. It also occurs that sheets are to be fed at an accurately determined moment with a particular speed, for instance to add these to a sheet passing along a transport path.
Although it is very well possible as such, with advanced motor controls, to meet the requirements set in practice, there is a need for optimizing the processing speed and simultaneously simplifying the motor controls, enabling allowance of wide manufacturing tolerances and limiting the use of sensors.
SUMMARY OF THE INVENTION
It is an object of this invention to provide a solution which makes it possible to bring sheets fast and accurately into a particular position or to pass them at a particular moment with a particular speed along a particular point.
This object is achieved according to this invention by providing a method for accurately manipulating at least one sheet, in which in a first time interval the at least one sheet, another sheet or a holder for receiving a sheet is accelerated or decelerated; at least one quantity which forms a measure for the deceleration or acceleration in the first time interval is measured; at least one measuring result obtained upon measuring is registered; and subsequently a moment at which an acceleration or deceleration of the at least one sheet in a second time interval after the first time interval is started is determined in accordance with the registered measuring result.
For achieving this purpose, this invention further provides and apparatus for accurately manipulating at least one sheet, having: means for at least accelerating or decelerating at least one sheet; at least one measuring means for measuring at least one quantity which forms a measure for the deceleration or acceleration of the at least one sheet; a control means for operating the means for at least accelerating or decelerating at least one sheet; wherein the control means is arranged for obtaining in cooperation with the at least one measuring means at least one measuring result which represents a deceleration or acceleration of the at least one sheet within a first time interval, for registering the measuring result and for determining, in accordance with the registered measuring result, a moment at which an acceleration or deceleration in a second time interval is started. Such an apparatus is specifically arranged for enabling the method according to the invention to be practiced.
As a moment at which an acceleration or deceleration in a second time interval is started is determined in accordance with a measuring result obtained during another deceleration or acceleration in a first time interval, what is obtained in a very simple manner and without necessity for real-time feedback and control is an accurate determination of the moment at which the intended acceleration or deceleration is to be started to reach a particular position as fast as possible or to pass a particular point with a particular speed at a particular moment.
Further objects, features, effects and constructional details of this invention appear from the claims and the following description, with reference to the drawings.
REFERENCES:
patent: 3730326 (1973-05-01), Irving, Jr. et al.
patent: 3744614 (1973-07-01), Shooter
patent: 4272069 (1981-06-01), Matthews
patent: 4558265 (1985-12-01), Hayashida et al.
patent: 5502544 (1996-03-01), Carolan
patent: 5527121 (1996-06-01), Santon
patent: 5632587 (1997-05-01), Coyette
patent: 6149151 (2000-11-01), Blanchard et al.
patent: 63-136762 (1988-08-01), None
patent: 3-083448 (1991-09-01), None
Burns Doane Swecker & Mathis L.L.P.
Ellis Christopher P.
Neopast B.V.
Ridley Richard
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