Conveyors: power-driven – Conveyor section – Pusher conveyor and separate load support surface
Reexamination Certificate
1999-04-15
2001-09-04
Valenza, Joseph E. (Department: 3651)
Conveyors: power-driven
Conveyor section
Pusher conveyor and separate load support surface
C198S733000, C198S734000, C271S198000
Reexamination Certificate
active
06283276
ABSTRACT:
TECHNICAL FIELD
The present invention relates generally to apparatuses and methods for conveying and pushing sheets, and more particularly to an overhead pusher finger guide for pushing sheets.
BACKGROUND OF THE INVENTION
The use of chain or belt mounted pusher elements is well known in the art of paper handling. Such pushers are used to push a sheet or group of sheets from the rear and down a sheet path. Typically, two side-by-side pushers are used so that the sheets or group of sheets will be fed down the sheet path without imparting any skew thereon.
Because the sheets are moved down the sheet path after being subject to a large acceleration and at a high speed, accurate sheet movement and placement becomes more critical. However, mechanical limitations on the various elements that make up the pusher element conveyor system may detract from such accurate sheet movement and placement.
Accordingly, there is room for improvement within the art.
OBJECTS OF THE INVENTION
It is an object of the present invention to provide an overhead pusher finger guide that causes sheets to be fed down a sheet path with less opportunity for sheet skew to be introduced.
It is a further object of the present invention to provide an overhead pusher finger guide that causes sheets to be fed down a sheet path with less opportunity for sheet skew to be introduced by controlling the degrees of freedom of movement allowed on the pusher.
These and other objects of the present invention are achieved by a conveyor assembly, comprising: at least first and second spaced apart sprockets; an endless conveyor spanning between the at least first and second sprockets; at least one pusher element fixed to the endless conveyor; and a guide member, the guide member guiding the at least one pusher element along a predetermined path.
REFERENCES:
patent: 1589059 (1926-06-01), Fink et al.
patent: 2319281 (1943-05-01), Winters
patent: 2536575 (1951-01-01), Seldin
patent: 2559819 (1951-07-01), Hettinger
patent: 2946427 (1960-07-01), Friedman
patent: 3408926 (1968-11-01), Rogerson
patent: 4051948 (1977-10-01), Sackett
patent: 5806659 (1998-09-01), Middelburg et al.
Bell & Howell Mail and Messaging Technologies Company
Jenkins & Wilson, P.A.
Valenza Joseph E.
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