Textiles: fiber preparation – Working – Fluid or special treatment
Reexamination Certificate
1999-02-19
2001-06-26
Calvert, John J. (Department: 3765)
Textiles: fiber preparation
Working
Fluid or special treatment
C019S0650CR, C019S200000, C019S205000, C209S580000, C209S639000
Reexamination Certificate
active
06249935
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application claims the priority of German Application Nos. 198 06 894.8 filed Feb. 19, 1998 and 198 47 237.4 filed Oct. 14, 1998, which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
This invention relates to an apparatus for removing foreign material from a rapidly rotating fiber opening roll of a fiber processing machine which may form part of a fiber processing line. The clothing of the opening roll is associated with at least one feed roll (also referred to hereafter as withdrawing roll), a cover and an optical sensor system for recognizing foreign material. The optical sensor system is connected with an electric control-and-regulating device which, in turn, is coupled to a device which removes the foreign material and which includes a mechanism for generating an air blast directed to the clothing of the opening roll for dislodging and carrying away the foreign material from the clothing of the opening roll.
German Offenlegungsschrift (application published without examination) No. 195 43 526 discloses an apparatus in which two slowly rotating feed rolls laterally cooperate with the opening roll for advancing the fiber material thereto. Guide plates are provided for maintaining the co-rotating air screen on the opening roll. At the lower end of the opening roll a sensor device is disposed for optically recognizing foreign bodies in the fiber tufts. The sensor device is disposed in a collecting chamber for the separated foreign parts. Between the guide plate and a knife an aperture is provided through which, for a short period of time, an air blast is directed from below in an oblique orientation to that region of the roll surface where the fiber tufts contain the foreign bodies. As a result, the contaminated fiber tufts are blown off the roll surface and are subsequently carried away.
It is a disadvantage of the above-outlined prior art device that it needs substantial space because of the lateral introduction of the fiber tufts from a laterally arranged accumulator, conveyor or the like and also because of the arrangement of the optical sensor device and the blowing direction of the air-blast generating source in the region underneath the opening roll. It is a particular drawback that the air-blast generating device is situated in the waste collecting chamber which may lead to significant operational disturbances, interruptions and down times.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved fiber processing machine of the above-outlined type from which the discussed disadvantages are eliminated and which, in particular, is structurally simple and compact.
This object and others to become apparent as the specification progresses, are accomplished by the invention, according to which, briefly stated, the fiber processing machine includes a rotatably supported clothed opening roll; a withdrawing roll adjoining the opening roll and supported for rotation for forwarding the fiber material to the opening roll; an optical sensor system for detecting foreign material carried on the opening roll along with fiber material; an air stream generating device for directing an air blast to the clothing of the opening roll; a control-and-regulating device to which the optical sensor system and the air stream generating device are connected for operating the air stream generating device upon detecting foreign material by the optical sensor system to remove and carry away the foreign material from the clothing of the opening roll by an air stream; and a collecting chamber for receiving the air stream carrying the foreign material.
By virtue of the fact that the air stream is guided into a collecting chamber, the air stream, together with the contaminated fibers (that is, fibers intermingled with the foreign bodies) may be captured and its velocity reduced. Swirling of the air is prevented and, at the same time, the fibers and the foreign bodies are collected. Such a capture occurs in the desired direction and at a suitable location. The provision of such a collecting chamber eliminates a source of danger posed by the powerful air stream.
By providing, according to a further feature of the invention, for the fiber material a substantially vertical feed chute, at the lower end of which a withdrawing roll and therebelow an opening roll are disposed, the fiber material is presented to the clothing of the opening roll by the withdrawing roll from above. The withdrawing roll at the same time serves as a feed roll for the opening roll and is disposed adjacent an upper region of the opening roll. Such an arrangement saves horizontal space in the blow room.
The invention has the following advantageous additional features:
The collecting chamber is situated adjacent the opening roll.
The collecting chamber is dimensioned such that the air stream expands therein upon introduction.
The compressed air stream generates a suction stream.
The suction stream tears away the fibers with the foreign bodies from the opening roll, and has a velocity of, for example, 10-25 m/sec.
The compressed air stream is discharged by sectional nozzles.
The air stream carrying fibers and foreign bodies from the clothing of the opening roll passes through a channel which opens into the collecting chamber and which is provided with a stream-deflecting member.
REFERENCES:
patent: 2166925 (1939-07-01), Mitchell et al.
patent: 2929112 (1960-03-01), Massey et al.
patent: 4839943 (1989-06-01), Leifeld
patent: 4858277 (1989-08-01), Pinto et al.
patent: 5205019 (1993-04-01), Schnlichter et al.
patent: 5522119 (1996-06-01), Leifeld et al.
patent: 5626237 (1997-05-01), Hergeth
patent: 5692622 (1997-12-01), Hergeth
patent: 5761771 (1998-06-01), Leifeld
patent: 5791489 (1998-08-01), Leifeld
patent: 5819373 (1998-10-01), Schlichter et al.
patent: 1 096 808 (1961-01-01), None
patent: 84 31 649 (1985-02-01), None
patent: 87 13 684 (1989-03-01), None
patent: 43 40 165 (1995-06-01), None
patent: 43 40 173 (1995-06-01), None
patent: 195 16 569 (1996-11-01), None
patent: 195 18 783 (1996-11-01), None
patent: 195 18 785 (1996-11-01), None
patent: 195 18 762 (1996-11-01), None
patent: 195 43 526 (1997-05-01), None
patent: 195 47 819 (1997-06-01), None
patent: 37 03 449 (1998-07-01), None
patent: 0 606 626 (1994-07-01), None
patent: 2 210 907 (1989-06-01), None
patent: 96/35831 (1996-11-01), None
Calvert John J.
Kelemen Gabor J.
Trutzschler GmbH & Co. KG
Venable
Welch Gary L.
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