Conveyors: power-driven – Conveyor section – Unit load conveying surface means moved about an endless or...
Reexamination Certificate
1999-04-08
2001-05-29
Valenza, Joseph E. (Department: 3651)
Conveyors: power-driven
Conveyor section
Unit load conveying surface means moved about an endless or...
C271S204000
Reexamination Certificate
active
06237751
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a clamping claw for an endless conveyor such as a chain conveyor. A fixed clamping jaw and a movable clamping jaw are provided. The movable clamping jaw has closed and opened positions on either side of a dead center position. A lever arm is used to move the movable clamping jaw.
DESCRIPTION OF THE PRIOR ART
A prior art clamping claw for an endless conveyor is known from EP 0 386 442 A2, wherein a first, fixed clamping jaw is arranged in an open position, and in which a pivotably seated second clamping jaw can be moved against the first clamping jaw. The pivotable clamping jaw is arranged on a first lever arm of a three-armed lever. An actuating roller for actuating the clamping jaw in its open and closed position is seated on a second lever arm. A third lever arm is embodied as an element of a device for introducing the clamping force, wherein this device overcomes a dead center when the clamping jaw is actuated.
U.S. Pat. No. 3,055,480 describes an endless conveyor for paper products, wherein the paper products are held by means of automatic locking between two clamping jaw. For opening, one of the clamping jaw is directedly actuated by means of a lever.
SUMMARY OF THE INVENTION
The object of the present invention is based on providing a clamping claw for an endless conveyor.
In accordance with the present invention, this object is attained by providing a clamping claw for an endless conveyor, such as a chain conveyor. A first fixed clamping jaw and a second movable or adjustable clamping jaw are provided. A lever is used to bring the adjustable jaw into open and closed positions by overcoming a center position. A spring is used to hold the adjustable jaw in its open and closed positions.
The advantages which can be attained by means of the present invention reside, in particular, in that a clamping claw has been created with the use of a few components, whose movable clamping jaw is maintained, after passing dead center, in two defined end positions by means of a spring force.
It is of particular advantage that in the closed position the movable clamping jaw applies automatic locking to the clamped printed product. In the clamped position, it is impossible to pull out, and therefore to lose, the printed product to be conveyed. It is furthermore possible to do without large spring forces because of the presence of the self-securing clamping jaws. This results in increased service life of the components of the clamping claw.
The clamping claw is designed without a housing. Each clamping claw has a clamping claw bottom, which constitutes a stop for the products to be picked up. This stop assures a gentle pick-up as well as an error-free deposit of the product to be conveyed.
A simple construction which has a force gradient, and which is easy on the components, is achieved in that an actuation force and/or the clamping force is additionally introduced into a lever supporting the clamping jaw.
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Jones Tullar & Cooper P.C.
Koenig & Bauer Aktiengesellschaft
Valenza Joseph E.
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