Leather manufactures – Machines – Fluid-treating apparatus
Patent
1997-08-22
1998-11-10
Neas, Michael A.
Leather manufactures
Machines
Fluid-treating apparatus
60 44, 60202, C14C 1100, C14C 1500
Patent
active
058327517
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an impregnating machine for surface impregnating hides or similar products.
In particular, the present invention relates to an impregnating machine for surface impregnating hides or similar products, the machine being of the type comprising conveying means defining a given path for the hides, and for feeding the hides in a given direction along said path; a cylindrical impregnating roller rotating in the opposite direction to said given direction, and presenting a given radius and a cylindrical outer surface; and a deflecting member for imparting a given curvature to a portion of said path; said path portion being located facing the periphery of the impregnating roller, and defining, with the periphery of the impregnating roller, a narrow passage for the hides; and said conveying means being, upstream from said passage, continuous conveying means arranged on opposite sides of said path to define a feed channel for the hides.
BACKGROUND ART
In EP-A-0 484 740, an impregnating machine is disclosed of the type described above, and wherein a hide conveying member, comprising a belt and defining the aforementioned advancement path for the hides, is wound about a deflecting roller defining the aforementioned deflecting member, and is positioned facing the impregnating roller to define therewith the aforementioned narrow passage for the hides.
The impregnating roller of EP-A-0 484 740 is so operated that, at the noted narrow passage, its periphery travels in the opposite direction to that of the conveying member.
Counter rotation of the impregnating roller in relation to the facing conveying member generates several problems stemming from the impregnating roller tending to push the hides back at the narrow passage.
In order to avoid the above, in the machine manufactured in accordance with EP-A-0 484 740 several precautions where taken. As a first precaution, in order to impart a better traction to the hides, the deflecting roller was chosen as large in diameter as possible so as to keep the traction imparted by the conveying member to each hide at the noted narrow passage as aligned as possible to the portion of the hide arranged upstream from the narrow passage. As a second precaution, the noted feed channel for the hides was interrupted a predetermined distance from the narrow passage to allow insertion, between the outlet of the feed channel and the narrow passage, of a guiding blade an edge of which was arranged substantially at the narrow passage.
The above precautions notwithstanding, the machines manufactured in accordance with EP-A-0 484 740 proved to be somehow unsatisfactory owing to the hides tending to jam between the guiding blade and the outlet of the feed channel.
DISCLOSURE OF INVENTION
It is an object of the present invention to provide an impregnating machine wherein the impregnating roller is operated in the opposite direction to that in which the hides travel, but which enables the hides to be fed smoothly and safely onto the impregnating roller.
According to the present invention, there is provided an impregnating machine for surface impregnating hides or similar products, the machine comprising conveying means defining a given path for the hides, and for feeding the hides in a given direction along said path; a cylindrical impregnating roller rotating in the opposite direction to said given direction, and presenting a given radius and a cylindrical outer surface; and a deflecting member for imparting a given curvature to a portion of said path; said path portion being located facing the periphery of the impregnating roller, and defining, with the periphery of the impregnating roller, a narrow passage for the hides; said conveying means being, upstream from said passage, continuous conveying means arranged on opposite sides of said path to define a feed channel for the hides; and the machine being characterized in that said path portion presents a radius of curvature equal to a relatively small fraction of the radius of the impregnating
REFERENCES:
patent: 5235829 (1993-08-01), Belluzzi
patent: 5653130 (1997-08-01), Dokoupilova et al.
Elitas S.n.c. di Belluzi Lino & C.
Neas Michael A.
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