Textiles: fiber preparation – Working – Fluid or special treatment
Reexamination Certificate
1999-02-19
2001-10-09
Calvert, John J. (Department: 3765)
Textiles: fiber preparation
Working
Fluid or special treatment
C019S0650CR, C019S105000, C019S200000, C019S204000, C209S580000, C209S639000
Reexamination Certificate
active
06298522
ABSTRACT:
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, together with the air-blast generating source, in the region underneath the opening roll. It is a particular drawback that the optical sensor device and the air-blast generating device are situated in the waste collecting chamber. This may lead to significant operational disturbances 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 generally vertically oriented feed chute having an upper portion and a lower portion; a device for introducing fiber material into the upper chute portion; a clothed fiber opening roll supported for rotation in the lower chute portion; a withdrawing roll adjoining the opening roll and supported for rotation for drawing fiber material in the feed chute and for forwarding the fiber material to the opening roll; an optical sensor system supported above the opening roll laterally of the feed chute for detecting foreign material carried on the clothing of the opening roll along with the fiber material; an air stream generating device for directing an air blast to the clothing of the opening roll; and a control-and-regulating device 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 blast.
The fiber material is supplied to the opening roll through the substantially vertical feed chute from above by means of the withdrawing rolls which also serve as feed rolls for the opening rolls and adjoin the upper region of the opening roll. As a result, horizontal space is saved in the blow room. The optical sensor system which includes a camera, is also situated above the opening roll in the vicinity of the feed chute, leading to a compact structural arrangement. It is a further advantage of the invention that the optical sensor system is not adversely affected by waste, dust, fiber fly or the like.
The invention has the following additional advantageous features:
The optical sensor system is situated upstream of the air flow generating device, as viewed in the direction of rotation of the opening roll.
The optical system includes a pivotal diode-line camera arranged in the vicinity of the feed chute.
The suction air stream tears fibers containing
foreign bodies from the opening roll.
A lateral space is provided which is approximately parallel to the optical sensor device and into which the air stream carrying removed fibers and foreign bodies may enter and expand.
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Calvert John J.
Kelemen Gabor J.
Trutzschler GmbH & Co. KG
Venable
Welch Gary L.
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