Package making – Methods – Wrapping contents including cover forming
Reexamination Certificate
1999-02-09
2001-02-20
Kim, Eugene (Department: 3721)
Package making
Methods
Wrapping contents including cover forming
C053S228000, C053S234000
Reexamination Certificate
active
06189296
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method of packing a product.
BACKGROUND OF THE INVENTION
In the following description, reference is made purely by way of example to the packing industry, and in particular to cigarette packing machines for producing rigid hinged-lid packets of cigarettes, and on which a finished packet is normally formed by folding a preweakened blank of cardboard about a respective group of cigarettes wrapped in a sheet of foil material.
In the cigarette packing industry, it is common practice to us step-operated packing machines on which a blank is normally folded about a respective group of cigarettes as the group of cigarettes is transferred between the seats of successive packing wheels. In particular, a first folding operation, during which the blank assumes a substantially U-shaped configuration about the group of cigarettes, is normally performed by transferring the group of cigarettes from one seat on one wheel to a corresponding seat on a follow-up wheel, and by interposing the blank between the group and the seat on the follow-up wheel.
On step-operated packing machines, folding blanks about respective groups by transferring the groups between successive wheels is, mechanically speaking, fairly straightforward, seeing as the two corresponding seats of the two successive wheels are kept facing each other for a given time interval between successive operating steps of the wheels. Functionally speaking, however, folding the blanks as described above involves serious drawbacks on account of the ever-increasing operating speed of modern step-operated packing machines continually reducing the time interval and so increasing the likelihood of the blanks being damaged or folded incorrectly.
On continuous packing machines, folding the blanks by transferring the groups between successive wheels poses fewer operating problems, but seriously complicates the structure of the machine by requiring pairs of packing wheels comprising movable seats, and wherein each seat on each wheel is related dynamically to a corresponding seat on another wheel. That is, for a folding operation to be performed, two corresponding seats—one on one wheel and the other on a follow-up wheel—must be kept facing each other for a given length of time, while moving at least one of the two corresponding seats with respect to the relative wheel.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a packing method which is straightforward and cheap to implement in general, and in particular when using a continuous packing machine, and which at the same time provides for high-quality folding and high-speed performance.
According to the present invention, there is provided a method of packing a product in at least a first sheet of packing material; the method comprising the steps of feeding the first sheet to a first seat on a packing conveyor; feeding the product to a second seat on the same packing conveyor; and imparting a relative movement to said two seats to form, in one of said two seats, a first sheet-product assembly.
The present invention also relates to a machine for packing a product.
According to the present invention, there is provided a machine for packing a product in at least a first sheet of packing material, the machine comprising a packing conveyor; at least one first seat located on said packing conveyor to receive and retain said first sheet; at least one second seat located on said packing conveyor to receive and retain said product; and actuating means for imparting a relative movement to said two seats to form, in one of said two seats, a first sheet-product assembly.
REFERENCES:
patent: 3992855 (1976-11-01), Palmieri et al.
patent: 5129209 (1992-07-01), Focke
patent: 5168690 (1992-12-01), Quadrana
patent: 5771666 (1998-06-01), Bertuzzi et al.
patent: 2225564 (1990-06-01), None
Spatafora Mario
Tale' Fabrizio
G. D Societa' per Azioni
Kim Eugene
Ladas and Parry
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