Package making – Methods – Wrapping contents including cover forming
Patent
1987-01-29
1988-10-04
Sipos, John
Package making
Methods
Wrapping contents including cover forming
53456, 53209, B65B 1108
Patent
active
047747986
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method and an apparatus for packing products coming from a product line with packing blanks in a packing machine including at least one conveyor for advancing the blanks through the machine as well as erecting means for erecting the blanks around the products during conveyance through the machine, and a packing blank for use in carrying out the method.
There are no carriers or flights used in the method and apparatus in accordance with the invention for erecting the packing blank around the product, such flights otherwise being usual in similar machines. Conveyance of the blank through the machine is performed by a combined belt and vacuum conveyor right up to pressing down the lid flaps, after which the remaining flaps on the lid are folded down and sealed in a turning apparatus known per se. Since flights are not used, the machine has very short times for setting to different blank sizes, and there does not need to be any specific space between packing blanks or products, which means that unnecessary space between them is eliminated. The machine will thus be very effective. There is no need for synchronizing means between the products and the blanks, the products being sensed as to their position and thus they determine, with the aid of impulses sent to the magazine discharge, when the blank is to be taken from the magazine. In packing machines using flights, the flights can crush the packings in the machine when there is congestion, resulting in waste. This not the case with the inventive machine, which has a further advantage in that it is not restricted to a specific format. For example, when conveying fish sticks, or products of this type which cannot be conveyed on an ordinary conveyor, an overhead flight may be used for bringing the products to the packing blank. A further alternative with these flights is a means which moves down just before filling and stops the products simultaneously as they are aligned to have proper, mutual, relative positions so that they can be advanced to the packing blank uniformly.
The object of the present invention is thus to eliminate the disadvantages to be found in packing machines including flight means. The distinguishing features characterizing for the invention are disclosed in the following claims.
The invention will now be described in detail with reference to the accompanying drawing, on which
FIG. 1 schematically illustrates how a product from a product line is packed with the aid of a machine in accordance with the present invention while using a packing blank formed in accordance with the invention, and
FIGS. 1A-1H illustrate a top view of the packing blanks at various locations throughout the apparatus of the invention.
FIG. 2 is a plan of the packing blank used for carrying out the method in accordance with the invention.
As will be seen from the drawing, packing products takes place in the following manner. The packing blanks 1 are taken from an unillustrated magazine or from a roll in a prestamped state, and are fed upstanding on a belt conveyor 3 with their lids 4 facing upwards. Products 2 are simultaneously advanced on a product line 15 with the same direction, speed, spacing and number as the advanced blanks 1. During the advance of the blank 1 on the belt conveyor 3, a forward end wall flap 5 is folded preliminary on the bottom or tray part of the blank 1 to take away the bias in a crease line 6 joining the end wall flap 5 with the bottom 7 of the blank 1. This is done with the aid of an unillustrated means including belts and a fixed folding plate with a protuberance for stopping, and an abutment for the forward edge of the blank 1. After a short interval the flap 5 is released once again, the desired prefold having been achieved. The bottom 7 of the blank 1 is then raised up to about 90.degree. along a lid crease line 11 with the aid of a folding device 14 as seen in FIG. 1A. Shortly after this the product line 15 and blank line 3 meet and the end wall flap 5 is erected with the aid of a hook device 8, which is
REFERENCES:
patent: 3323275 (1967-06-01), Kingsbury
patent: 3563000 (1971-02-01), Whitehouse
patent: 4569182 (1986-02-01), Leuvering
Sipos John
Sprinter System AB
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