Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1984-09-11
1986-04-15
Simmons, David
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156227, 156443, 493151, 493177, 493178, B29C 500
Patent
active
045825521
DESCRIPTION:
BRIEF SUMMARY
This invention relates to carton forming apparatus.
In particular, the invention concerns an improved carton forming apparatus and a carton apparatus conversion method to provide the improved apparatus of the invention.
The method of the invention will be described in relation to its applicability to an S&S model ZLM machine. However, it should be appreciated that this is by way of example only and that the method of the invention is also applicable to machines of a similar nature to this.
The apparatus for forming such cartons in general is relatively complex and expensive and there are many factories throughout the world which have installed forming apparatus for forming the conventional regular slotted containers which have been widely used for many years. The various types of forming apparatus presently available for forming the regular slotted containers cannot be used to form the crash lock cartons. Thus entirely separate machines must be installed for this purpose. The cost of these machines is in the order of a quarter of a million dollars.
In the process of forming crash lock cartons, base panels thereof having connector tabs connecting them to adjacent side panels, have to be folded during the manufacturing process in a first direction towards the remaining body part of the blank while the connector tabs have to be folded in the reverse direction to their associated side panel for bonding to an adjacent side panel. Machines for forming regular slotted containers do not have this facility.
It is an object of the invention to provide an improved carton forming apparatus and a carton apparatus conversion method for providing an improved apparatus which alleviates the above mentioned disadvantages. Other objects and advantages of the invention will hereinafter become apparent.
Accordingly, the present invention provides an improved crash-lock carton forming apparatus for forming from a blank, a knocked-down carton having side panels and closure flaps, two of the closure flaps having depending connection tabs, the apparatus having exit rollers from a printing station at an upstream end and a downstream end at which formed knocked-down cartons may be removed, said apparatus further including: station having engagement means for lifting two of the flaps and folding said two flaps against associated side panels and folding the connection tabs in the reverse direction to the direction of folding of the two flaps; engagement means for lifting the remaining two flaps in the same direction as the lifting of the first two flaps and folding the remaining two flaps against associated ones of the side panels; inner two side panels to thereby bond the remaining two flaps to respective ones of the connector tabs; outer side panels and associated closure flaps and conveying the blank towards the downstream end of the apparatus; and upstream of said third forming station for engaging the blank and conveying it to said third forming station.
According to another aspect, the invention provides a method of converting a carton forming machine of the type which bonds a joining flap to a side panel of a regular slotted carton or half slotted carton into a machine for forming known down crash-locked cartons, the machine having holding and conveying means extending from adjacent exit rollers of a printing station at an upstream end to a downstream location terminating upstream of a forming station for folding the blank to bond the joining flap to the side panel of the blank, said method including the steps of: conveying means, said first conveying means being upstream of said second conveying means; said first conveying means and said firs engagement means providing a first station at which two of the flaps of the blank are lifted and folded against the associated side panels whilst folding connector tabs associated with the flaps in the reverse direction to the direction of folding of the two flaps; said first conveying means to form a first carton forming station for lifting two of the flaps of the blank and folding them
REFERENCES:
patent: 1926364 (1931-02-01), Bergstein
patent: 2125147 (1958-07-01), Bergstein
patent: 2899872 (1959-08-01), Labombarde
patent: 3884130 (1975-05-01), Stolkin et al.
patent: 4319878 (1982-03-01), Dozier
Fitzgibbon Maxwell A.
Jones Gregory T.
Waite Graham E.
James Hardie Containers Limited
Simmons David
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