Food or edible material: processes – compositions – and products – Processes – Packaging or treatment of packaged product
Patent
1988-01-14
1989-11-14
Weinstein, Steven
Food or edible material: processes, compositions, and products
Processes
Packaging or treatment of packaged product
53413, 53462, 53466, B65B 2904
Patent
active
048806510
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a method of and apparatus for producing and attaching holders/covers to bags containing infusible products.
BACKGROUND OF THE INVENTION
In my earlier Patent Application PCT/AU85/00279 there is disclosed a tea bag and cover, the cover comprising two leaves about a fold line, said tea bag being attached by attachment means to one leaf adjacent said fold line whereby said fold line is above said attachment means to enable the leaves to fold to one side of the bag with no part of either leaf being on the cup side of the bag when suspended in a cup by inserting the bag inside the cup with one leaf passing down the outside of the cup.
Also there is disclosed the method of manufacturing a tea bag and cover, the tea bag having a crimped peripheral flange, the method comprising the steps of providing a sheet of paper to form the cover, stapling the tea bag to the sheet of paper at a position below the transverse center line of the sheet, and forming a fold line on the transverse center line of the sheet to form two leaves to overlie the tea bag.
Thus, that invention describes a tea bag and protective cover which will protect the tea bag in packaging and storing, while providing means to support the tea bag in the liquid in the cup without obstructing the opening to the cup, and which can be agitated to improve and speed up infusion and which also can be used for safely withdrawing the tea bag from the cup for squeezing the residue and eventual disposal of the tea bag.
BRIEF SUMMARY OF THE INVENTION
The present invention relates to a method of manufacturing an infusible bag and cover, the method including the steps of feeding the covers, placing and orientating a bag on the cover, attaching the bag to the cover, and creasing the cover across its width in its center adjacent the attachment of the bag to the cover, folding the leaves of the cover over the bag, and stacking the bags for packaging.
Also there is provided an apparatus for producing an infusible bag and cover, the apparatus comprising conveyor means for feeding a cover, means for placing and orientating a bag in position on the cover, means for attaching the bag to the cover, means for creasing the cover across the width of the cover adjacent the attachment of the bag to the cover, means for folding the leaves of the cover over the bag, and means for stacking and packaging the tea bag and cover.
In one form of the invention the cover is preferably a sheet of paper or thin plastics material which can be fed from a reel and cut to the required length, or can be fed from a stack onto a continuous conveyor. The conveyor is provided with spaced lugs, and the cover is positioned with its leading edge against a front lug, the lugs being spaced apart to enable a single cover to be positioned between each lug, the lugs being spaced slightly greater than the length of each of the covers to provide delivery clearance.
The infusible bags or pouches are made in a separate pouch maker and preferably have a crimped flange along at least one edge thereof and are positioned on the leading edge of the cover by use of grippers, suction means, or means to slide the pouch against the front lug, the feeding means and the belt speed being synchronized with the pouch delivery.
The belt then delivers the cover and pouch thereon to a stapling and creasing means, these in one form being a combined unit, to staple and crease the pouch and cover against a mandrel and a groove built into the conveyor web. The stapling and grooving unit can reciprocate at the conveyor web speed and moves downwardly to insert the staple and create the crease in the cover adjacent the attachment point.
Alternatively, the creasing and stapling can be carried out separately, and also other forms of attachment of the pouch to the cover can be utilized. For example the creasing and attachment can be achieved by a heating unit to seal the flange portion of the pouch to the cover there being a slit in the web on the opposite side of the sealing head to form the crease. The unit
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Adams Bruce L.
Weinstein Steven
Wilks Van C.
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