Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With cutting – punching – piercing – severing – or tearing
Patent
1996-12-16
2000-05-16
Mayes, Curtis
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With cutting, punching, piercing, severing, or tearing
156358, 156520, 156522, 156552, 156265, 156270, 156301, 156302, 1563084, 83346, 53520, 53435, 604304, B32B 3100, A61F 1302
Patent
active
060622857
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a machine for manufacturing adhesive dressings.
More particularly the invention relates to a machine for manufacturing small sized "strips" type and large sized "island dressing" type surgical adhesive dressings having a length comprised between 8 and 35 cm and a width comprised between 8 and 10 cm.
2. Description of the Prior Art
Conventional machines used for manufacturing adhesive dressings of the aforementioned type have alternate or rotary movement.
The adhesive support is unwound from rolls, separated from its protective film and perforated if necessary.
Absorbing compresses, obtained by transversely cutting a tape of absorbing material, are then applied onto said adhesive support at the required intervals.
Then a protective material generally made of silicone paper is applied which covers both the adhesive support and the absorbing compresses.
The so obtained product is then guided through a cutting zone wherein cutting and trimming are carried out by one or more cutting knives to obtain finished dressings of various lengths.
After the aforementioned operations the dressings can be wrapped or enveloped in wrappers or envelopes generally obtained by coupling two tapes of cold or hot weldable material unwound from rolls.
The most complex operations which are to be performed by the machine during the above disclosed manufacturing process are cutting the absorbing material to the desired size and placing the absorbing compresses at the desired intervals.
In the presently known state of the art these operations need to be carried out by several cooperating means.
More particularly, known machines include drawing and feeding means, e.g. pairs of rolls suitably synchronized, cutting means, e.g. alternative or rotating cutting knives, spacing means, e.g a further pair of rolls or suckers or suction means.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a machine for manufacturing adhesive dressings of the above referred type wherein all the described operations for preparing and placing the absorbing material compresses are carried out by a single device.
Another object of the present invention is to provide the above machine in a form which can be easily manufactured and which is simple and reliable to operate.
A further object of the present invention is to provide the above machine in a form which allows a quick replacement of the parts thereof when a different format for the product is required, as is not infrequently the case.
These and other objects are achieved by the machine of the present invention according to claim 1.
BRIEF DESCRIPTION OF THE DRAWINGS
A detailed description of a preferred, though non-limiting, embodiment of the machine according to the invention is now presented with reference to the following figures:
in FIG. 1 the essential parts of the machine according to the invention are illustrated in a schematic general view;
FIG. 2 is a schematic lateral view of absorbing tape cutting rolls;
in FIG. 3 the components of a machine for larger dressings comprising a wrapping unit according to the invention are illustrated in a schematic general view.
DETAILED DESCRIPTION
Referring to the attached figures, the adhesive dressing 1 include a protective layer 2 unwound from a roll 3 of a protective material tape, an adhesive support 4, which is separated from its protective film 9 after being unwound from a roll 5, the protective film 9 being rewound on a roll 10 to be recovered, and an absorbing compress 6 obtained by cutting off a tape 7 of absorbing material unwound from a roll 8.
The absorbing dressing 1 manufacturing machine comprises a first pair of rolls 11 and 12 for drawing and cutting the absorbing material tape 7 therebetween, thereby obtaining absorbing compresses 6.
The machine further includes a second pair of rolls 13 and 14 for drawing the adhesive support 4 and the protective layer 2 once the compresses 6 are on the adhesive support 4.
Said pair of rolls 13
REFERENCES:
patent: 2711739 (1955-06-01), Fishbein
patent: 2946281 (1960-07-01), Sohn
patent: 3325335 (1967-06-01), Martensson
patent: 4214936 (1980-07-01), Del Bianco
patent: 4235337 (1980-11-01), Dotta
patent: 4779781 (1988-10-01), Billberg et al.
patent: 4919027 (1990-04-01), Littleton
Paatent Abstract of Japan vol. 8 No. 108 (M-297), May 19, 1984 (see abstract) for JP5901915.
English Abstract for DE 3145912 A Jun. 9, 1982 Dialog (R) 351-World Patent Index.
Dotta Angelo
Dotta Giorgio
Gray Linda L
Mayes Curtis
Plastod SpA
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