Package making – Methods – Wrapping contents including cover forming
Reexamination Certificate
1999-07-06
2001-04-24
Vo, Peter (Department: 3721)
Package making
Methods
Wrapping contents including cover forming
C053S228000, C053S234000, C053S373700, C053S375900, C053S463000, C053S477000
Reexamination Certificate
active
06219999
ABSTRACT:
The present invention relates to a method of wrapping products.
The present invention is particularly advantageous for use on machines for cellophaning packets of cigarettes, to which the following description refers purely by way of example.
BACKGROUND OF THE INVENTION
On known machines for cellophaning packets of cigarettes, the packets of cigarettes are fed by a first conveyor at a given speed along a first wrapping path to form respective tubular wrappings, each comprising two opposite open ends about the packet, and are fed by a second conveyor at the same speed along a second wrapping path to close the ends of each tubular wrapping.
As it normally takes longer to close the ends than to form the tubular wrapping, and as the packets are fed at the same given speed along both paths, the second path must necessarily be longer than the first, which normally means a considerable increase in the size and cost of the second conveyor, on account of numerous technical features normally preventing changes to other construction characteristics of the machine.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a method of wrapping products, designed to eliminate the aforementioned drawback, and which at the same time is cheap and easy to implement.
According to the present invention, there is provided a method of wrapping products in respective sheets of wrapping material, the method comprising the steps of feeding said products successively along a first wrapping path to form, about each product, a respective tubular wrapping having two opposite open ends; and feeding said products successively along a second wrapping path to close and stabilize the respective said open ends; the method being characterized in that said products are fed along said first wrapping path in spaced relation from one another at intervals forming a first spacing between sucessive products along said first wrapping path, and said products are fed along said second wrapping path in spaced relation from one another at intervals forming a second spacing, smaller than the first spacing.
The present invention also relates to a machine for wrapping products.
According to the present invention, there is provided a machine for wrapping products in respective sheets of wrapping material, the machine comprising a first conveyor for feeding said products successively along a first wrapping path; first wrapping means located along said first wrapping path to form, about each product, a respective tubular wrapping having two opposite open ends; a second conveyor for feeding said products successively along a second wrapping path; and second wrapping means located along said second wrapping path to close and stabilize the respective said open ends; the machine being characterized in that said first and said second conveyor provide for feeding said products with a first and a second spacing respectively, the second spacing being smaller than the first spacing.
REFERENCES:
patent: 2720738 (1955-10-01), Brightwell
patent: 4718216 (1988-01-01), Focke et al.
patent: 5477661 (1995-12-01), Draghetti et al.
patent: 5794413 (1998-08-01), Draghetti
patent: 5839253 (1998-11-01), Draghetti
patent: 6023909 (2000-02-01), Boldrini
patent: 6062000 (2000-05-01), Focke et al.
patent: 1134500 (1968-11-01), None
patent: 2206327 (1989-01-01), None
patent: 2244970 (1991-12-01), None
Ghini Marco
Spatafora Mario
G. D Societa per Azioni
Huynh Louis
Ladas & Parry
Vo Peter
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