Package making – With means responsive to a sensed condition – Separate delivery of incomplete or defective contents or...
Reexamination Certificate
1999-04-20
2001-09-11
Hughes, S. Thomas (Department: 3726)
Package making
With means responsive to a sensed condition
Separate delivery of incomplete or defective contents or...
C053S244000, C053S246000, C053S247000, C053S252000, C053S498000, C198S460100
Reexamination Certificate
active
06286290
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application claims the priority of Swiss Application No. 1156/98 filed May 26, 1998, which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
International Application WO 96/41760 describes an apparatus for conveying products to a packing machine. The apparatus has two parallel, separately driven endless conveyor chains which carry, along less than one half of their circumferential lengths, carrier elements arranged at uniform distances from one another and extending from the respective chains. The carrier elements advance the products on a slotted slide plate from a receiving station through a work section to a discharge station where the products are packed in a tubular bag.
International Application WO 97/42108 describes a similar apparatus in which the two parallel conveyor elements are toothed belts.
U.S. Pat. No. 4,577,453 describes a conveyor apparatus which has but a single conveying element and wherein the products are, at the transfer station, first pushed in groups onto a table and are thereafter deposited by separate pushers into a packing container perpendicularly to the discharging direction.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved conveyor apparatus of the above-outlined type with which packing containers may be charged with products in a rational manner.
This object and others to become apparent as the specification progresses, are accomplished by the invention, according to which, briefly stated, the conveyor apparatus includes first and second parallel-spaced endless conveyors extending from a receiving station to a first transfer station for moving products in an advancing direction from the receiving station to the first transfer station and a plurality of product-carrying elements mounted on the first and second conveyors at a uniform spacing from one another. The product-carrying elements mounted on the first conveyor form a first group of product-carrying elements and the product-carrying elements mounted on the second conveyor form a second group of product-carrying elements. The first and second groups extend over one part of the length of the respective first and second conveyors. A drive moves the first and second conveyors independently from one another such that products are conveyable from the receiving station to the first transfer station alternatingly by the first and second conveyors. A discharge mechanism, situated at the first transfer station, includes a plurality of product-pushing elements for displacing products transversely to the advancing direction away from the product-carrying elements. The product-pushing elements are spaced identically to the spacing of the product-carrying elements. A third conveyor extends from the first transfer station to a second transfer station. Receiving elements are mounted on the third conveyor for carrying containers from the first transfer station, where products are placed into the containers by the product-pushing elements, to the second transfer station
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Compton Eric
Hughes S. Thomas
Kelemen Gabor J.
SIG Pack Systems AG
Venable
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