Abstract: A control unit (10) for “pilgrim step” operation of the detaching cylinders (22, 23) in a combing machine, comprising a first electric motor, which rotates the circular comb (18) of the combing machine with uniform motion and a second electric motor (11), rotating a shaft (12), which houses the components to transmit motion to the detaching cylinders (22, 23). The first electric motor also operates at least one of the components that transmit motion to the detaching cylinders (22, 23), and the motor (11) is operated with a law of motion comprising acceleration and deceleration phases. Both motors mesh at all times and the first motor operates the components to transmit motion to the detaching cylinders (22, 23) by means of a differential device to obtain motion of the “pilgrim step” type.

Abstract: A method and device substitutes, prepares and joins laps in a combing machine, in which the preparation of an edge of a new lap package is made by holding fast the package in an unwinding position, while handling its clamped and crimped edge in a tearing manner.

Abstract: A comber machine with a nipper head (3) has a fixed bearing (2), and at least one pair of detaching rolls (6") which are rotatably mounted in bearings (41). The nipper head (3) and the detaching rolls (6") are moved during a combing cycle towards one another and away from one another by the distance of a stroke path, up to a minimum distance which corresponds to a predetermined separation value. While still maintaining the stroke path, the predetermined separation distance (ecartement value) can be adjusted. To facilitate the setting of the ecartement value, provision is made for bearings (41) of the detaching rolls (6") to be displaced relative to the fixed bearing (2) of the nipper head (3), jointly on a track (45) which enlarges or reduces the separation value.

Abstract: A comber has a nipper head (3), detaching rolls (6), and half-lap (4), wherein, during a combing cycle, the nipper head (3) and the detaching rolls (6) are moved by a drive system (31 to 40) out of a rear end position relative to one another into a front end position and back again. The detaching rolls (6) are driven in a pull-off direction (25) of a combed tuft (11). The half-lap (4) is also driven. The nipper head (3) comes within an area of action of a needle segment (5) of the half-lap (4) during a section of the combing cycle. To increase performance, provision is made for the drive system (31 to 40) to rotate the half-lap (4) during a combing cycle by an integral number of rotations, at least twice. The length of the needle segment (5) is extended in the direction of rotation in accordance with a higher rotational speed.

Abstract: A camless lap nipping mechanism for use in a comber is disclosed. A nipper frame (3) is provided above a combing cylinder (1). A cushion plate (4) is mounted on a distal end of the nipper frame (3). The cushion plate (4) nips a lap (Lp) in cooperation with a nipper member (7). Two stationary pivots (14,15) are provided, one above and one below the nipper frame (3). A four-node link mechanism, having two movable pivots (20,21) with a following lever (19) located therebetween, is provided between the stationary pivots (14,15). The front portion of the nipper frame (3) is pivotably linked to the following lever (19). A nipper shaft (11), and the four-node link mechanism (17,18,19) cooperate in rocking the nipper frame (3).

Abstract: A card web comb driving system in machines for the textile industry comprng a comb structure (27) mounted in such a way as to oscillate around a resting position under the control of elastic means (23 and 24) which accumulate mechanical energy and are associated with electrical motor means (20) of the type in which the direction of rotation can be inverted with the variation of the electrical signal. The motor means (20) is associated with a sensor (31) of the instantaneous angular position of the shaft (30) of the motor (20) and consequently of the instantaneous angular position of the comb structure (23, 26 and 27). The sensor (31) is connected to the power supply (21) of the motor (20) in order to establish a persistent oscillatory condition on the movable element of the motor (22) and consequently on the comb structure. The motor (20) can be represented by a brushless type motor or by a direct current motor with a constant excitation field.

Abstract: The combing machine as provided with a nipper jaw unit in which a nipper lip is provided on the top nipper plate to project in overlapping relation to the lower nipper plate for clamping a wadding therebetween. In a fully closed position of the nipper plates, with the nipper plates in contact, the nipper lip projects into the plane of the needles of the combing segment of the combed cylinder. However, the combed segment is provided with raised bearing segments to lift the nipper lip away from the needles over a safety clearance. In other embodiments, stops can be provided on the lower nipper to limit the movement of the top nipper towards the closed position.

Abstract: The nipper unit comprises a lower nipper as well as a an upper nipper and an auxiliary nipper, the latter two each being movable with respect to the lower nipper between a closed position and an open position. The auxiliary nipper is spring-loaded against its closed position. If the upper nipper is in its opened position, the auxiliary nipper is in its closed position and is used to tightly clamp a lap on a lower nipper plate while a previously combed fiber tuft is detached therefrom. When the upper nipper moves to its closed position, stop elements arranged on the upper nipper come into contact with stop surfaces arranged on the auxiliary nipper and open the auxiliary nipper so that the lap on the lower nipper plate can be advanced. The timing of the opening of the auxiliary nipper is determined by the position of the stop elements on the upper nipper.

Abstract: A straight wool-combing machine (10) has, instead of the conventional pair of detaching rollers, a pair of jaws (30, 32) for gripping the combed end of a tuft and for separating it, by a withdrawal movement, from the rest of the fibre sliver (M). The pair of jaws (30, 32) has a suction fan (31) for transporting the combed fibres pneumatically to a collecting store.

Abstract: A combing head comprises carrying and drive rollers for the lap roll, a cylinder, a detaching roller pair and nippers reciprocable between a drawn-back position and an advanced position. When the trailing end of the lap material runs off the winding tube, the combing machine is stopped at a time after the detaching roller pair have detached a fringe from the lap in the nippers and after the fringe has been separated from the lap. The lap trailing end and the empty winding tube are then removed and a new lap roll is placed on the carrying and drive rollers. Lap material is unwound from the new lap roll until the start of the lap has passed beyond the nip line of the nippers. The combing machine then restarts. The method can, if required, be performed substantially or completely automatically and calls for only a short machine down time.

Abstract: A textile machine is provided with apparatus for preparing the trailing end of a lap and a leading end of a fresh lap so that each end has a reduced fiber mass per unit length of lap in the prepared end. These lap ends are thereafter superimposed and joined together for subsequent processing in a combing unit of a combing machine or a drafting unit of a ribbon lap machine. The respective ends of the two laps may be prepared by a tearing action caused by clamping of the respective lap end between two spaced apart nip lines which are moved away from each other and wherein the spacing is slightly more than the length of the longest fiber in the lap. Preparation of a lap end may also be accomplished using a suction head for clamping of a lap along a nip line in order to carry out tearing of the lap to produced a prepared end.

Abstract: The batt or sheet to be combed is unwound by rotation of a lap roller (1) from a lap disposed thereon. The batt goes from the lap roller (1) by way of the lap feed plate (13) to a feed cylinder (10) mounted in oscillating nippers (6, 8). The feed plate (13) is connected by way of its bottom edge to the oscillating nippers (6, 8) and by way of its top edge to an element (16) which is rigidly secured to the frame and disposed near the lap roller (1). The plate (13) is made of plastics and has a reduced thickness between the two edges in a linear bend zone (18) which is parallel to the edges. The bend zone (18) extends over the whole width of the plate (13) and acts as an articulation. The plate (13) is therefore simple and economical to produce. It requires no hinge between the two edges; also, it is of reduced weight.

Abstract: The combing machine comprises a continuously rotatable circular-comb cylinder carrying a circular-comb segment and detaching segment. The detaching segment cooperates with a detaching pressure roll. The combing machine also contains a nipper unit comprising a lower nipper which is stationary relative to the axis of the continuously rotatable circular-comb cylinder, and an upper nipper which is movable relative to the lower nipper. The fibers detached by the detaching segment together with the detaching pressure roll are sucked as fiber clusters into a suction shaft or tube, or can be united to form a sliver at a rotatable screening or sieve drum. The suction shaft includes a flexible membrane to close the shaft. The combining machine is of simple construction and economical to manufacture and renders possible a high operating speed and, therefore, a higher output, particularly in the absence of a top comb between the lower nipper and the detaching pressure roll.

Abstract: Two lap slivers lying one on top of the other are continuously fed to the combing tools in a plurality of combing heads of a combing machine. The first lap sliver comes from a first lap roll carried by a rear carrier device, and runs over a front carrier device. A second lap roll is carried on this, from which the second lap sliver emanates. A detector determines when the end of the lap sliver from the first lap roll is running out in one of the combing heads. A control unit then executes a lap roll change on several combing heads simultaneously as follows: The end of the first lap sliver is severed to the same length in all the combing heads. The cut-off pieces of the lap slivers and the winding tubes of the first lap rolls are removed. The second lap rolls are rolled on to the rear carrier devices. New lap rolls are so placed on the front carrier devices that the start of the lap sliver on these new rolls is aligned with the end of the first lap sliver.

Abstract: The combing machine comprises a continuously rotatable circular-comb cylinder carrying a circular-comb segment and a detaching segment. The detaching segment cooperates with a detaching pressure roll. The combing machine also contains a nipper unit comprising a lower nipper which is stationary relative to the axis of the continuously rotatable circular-comb cylinder, and an upper nipper which is movable relative to the lower nipper. The fibers detached by the detaching segment together with the detaching pressure roll are sucked as fiber clusters into a suction shaft or tube, or can be united to form a sliver at a rotatable screening or sieve drum. The combing machine is of simple construction and economical to manufacture and renders possible a high operating speed and, therefore, a higher output, particularly in the absence of a top comb between the lower nipper and the detaching pressure roll.

Abstract: The combing machine has at least one comber head which contains a continuously rotatable comb cylinder, a reciprocating nipper jaw unit and at least one detaching roller. The detaching roller is rotated during every revolution of the comb cylinder at first through a small angle in a backwards direction and then through a large angle in a forward direction. The rotations of the detaching rollers are produced by an electric motor which receives appropriate drive pulses fed from an electronic control unit.

Abstract: The combing machine has at least one combing head having combing elements and a carrier for a lap roll for combing. Two pairs of transport rollers and a pair of pressing rollers are provided in the path of the lap from the lap roll to the combing elements. A movable deflector or element is also disposed adjacent the pressing rollers for a lap end. An automatic lap change is carried out when the lap has approximately completely unwound from the roll. The transport roller pairs are used to tear the lap therebetween with the resulting lap end advancing to the pressing rollers which is then stopped. After a fresh lap roll is placed in the machine, the forward end of the lap is moved between the transporting rollers and severed to form a second lap end. The deflector element serves to place the end of the fresh lap onto the previous lap end for combining within the pressure rolls.

Abstract: The nipper has a lower jaw which carries a nipper plate and an upper jaw with a nipper plate carried by two arms. At least a part of this nipper, e.g. the lower nipper plate and the upper nipper plate are made from bonded fiber material. In this way, the unit is lighter than a unit which is made completely from metal.

Abstract: The combing device supplies a lap of staple yarn to a nipper unit which, in turn, presents a tuft of the lap to a rotating comb cylinder for combing of the tuft. Thereafter, the combed tuft is delivered by the nipper unit directly to a pair of detaching rollers for detaching of the combed tuft from the lap. The elimination of a tuft comb allows a higher weight for the lap and, hence, increased production of the combing device. The combed tuft can then be drawn and spun into yarn, for example, by ring spinning.

Abstract: The combing machine comprises a detaching roll and an oscillating nipper unit comrising bottom and top nippers. The predetermined spacing for the oscillating nipper unit with respect to the detaching roll is adjustable, such predetermined spacing being the spacing between the front edge of a bottom-nipper plate and the nip location at the detaching roll when the oscillating nipper unit is in its front end position. A top comb is held in top-comb holders. Each top-comb holder on a top-comb bed is pivotably adjustable about an axis substantially parallel to the detaching roll, the top-comb bed being secured at the bottom nipper. Subsequent to an adjustment of the predetermined spacing, the top-comb holders are reset such that pins of the top comb are again located at the same predetermined distance from the detaching roll.

Abstract: The drive mechanism for the feed roll of a combing machine employs a freewheel having an inner member secured to the feed roll and a concentric outer member secured to the pivotal arm which mounts the top nipper. In addition, locking elements are disposed between the inner and outer members and the outer member provided with a sawtooth configuration so that the locking elements may lock during rotation of the outer member under the influence of the arm and may move into a released position during an opposite rotation of the outer member. The lost motion or idle travel in the changeover between the released position and the locking position is quite reduced. Thus, feeds are always of substantially exactly the same magnitude with a resulting improvement in the produced sliver.

Abstract: A top-comb driving mechanism applied to a conventional combing machine, wherein cycles of forward amd rearward reciprocal swinging displacing motions of a nipper body of each combing head are carried out, is provided with a motion transmission mechanism each one round rotation of a driving shaft in synchronism with a combing cylinder to each top-comb holding arms in a condition such that the reciprocal upward and downward swinging motion of a top-comb holding arm is created so that the above-mentioned forward end rearward reciprocal swinging displacing motion of the nipper body is combined with the above-mentioned reciprocal upward and downward swinging motion of the top-comb holding arms of each combing head, whereby each top-comb is reciprocally displaced along a locus of a forward displacement thereof which is a gentle convex curve directed slightly downward, and displaced along a locus of a rearward displacement thereof which is a gentle concave curve directed slightly upward, between a front terminal poi

Abstract: The combing machine comprises a nipper unit possessing a bottom nipper and a top nipper which is pivotable relative to the bottom nipper about a pivot axle. An additional nipper is pivotable relative to the bottom nipper about a shaft or journal which extends at a suitable distance from and substantially parallel to the pivot axle of the top nipper. The additional nipper is coupled to the top nipper by means of at least one link. In this manner, pivoting movements of the top nipper cause the additional nipper to be pivoted each time in the opposite direction with respect to the direction of motion of the bottom nipper. When the nipper unit is in an advanced end position, the top nipper is open and the additional nipper is closed. The additional nipper firmly holds the lap, and a tuft combed out of the latter is detached by a detaching roll. No separate pivot drive is required for the additional nipper.

Abstract: In a combing machine, in particular for combing of cotton, having a combing roller with at least one combing segment, conveying devices for the fiber tuft to be combed, and an upper and lower nipper for fixing the fiber tuft during the engagement of the combing segment, where the upper and/or lower nippers are seated pivotable in a forward and backward direction on an axis located above the comb cylinder, it has been provided, in order to attain a high operating speed while reducing the transfer paths and the mass to be moved, to derive the drive for the pivot movement of the upper and/or lower nippers directly from the drive for the combing roller by means of a cam drive.

Abstract: The lap guide arrangements employs a pair of guide plates for guiding the lap from the lap roller to the feed roller on the nipper. The two guide plates are connected by a strip of flexible material which permits pivoting of the plates relative to each other. The strip of flexible material is made of a high tensile strength so as to accommodate a high nip number, for example, from 300 to 350 per minute.

Abstract: The front end portion of a cushion plate (5) provided on the front end of a nipper frame (4) is swung along an upwardly facing arc (25), i.e., an arc with an inner side facing away from the combing cylinder (3). The nipper frame (4) with the cushion plate (5) is constructed as a four-joint link mechanism which consists of the nipper frame (4), a nipper shaft (10), nipper frame setting fulcrum (7), nipper frame driving arm (11), and nipper frame swing arm (8).

Abstract: A combing machine for textile fibres has a "gill" for combing a sliver of fibres and means for tearing successive tufts from the sliver of fibres as the tufts are combed, and partially superimposing the torn tufts on each other so as to form a continuous combed web. The tearing and superimposition is effected by contra-rotating tearing rollers mounted on support shafts which are rotatably supported at their ends by a pivotable carriage; each support shaft is also rotatably supported intermediate its ends, and carries two tearing rollers side by side and cooperating with a corresponding pair of tearing rollers mounted side by side on the contra-rotating support shaft.

Abstract: A combing machine having stationary detaching rollers, a circular comb and a reciprocating gripper. A first crank means is mounted on a gripper oscillation shaft and is pivotally connected to a lower gripper plate. A second driven crank means is pivotally connected by means of a guide link to the lower gripper plate for producing an effective combing relation between the gripper and the circular comb.

Abstract: The "cleaning-out" capability of a flat combing machine is increased by decreasing the distance between the jaw of the tong of the flat comber and the points of the opposed rows of needles on the round comber to a minimum distance and keeping this minimum distance constant. The needles are arranged on the round comber such that the radius of the needle points of the rows of needles lying side by side to the pivot of the round comber decreases, then increases, counter to the direction of rotation of the round comber. The tong is suspended by a pendulum and the distance between the pivot of the pendulum and the axis of the round comber is less than the sum of the maximum radius needle points to the pivot of the round comber, plus the minimum distance from the jaw of the tong to the needle points, plus the radius of the jaw of the tong to the pivot of the pendulum.

Abstract: A mechanism for driving the nipper shaft of a comber provided with a plurality of combing units, wherein a driving shaft and a nipper shaft are extended along the longitudinal direction of the comber. An eccentric disc is rigidly mounted on the driving shaft. A slider link motion mechanism is provided with a slider connected to the eccentric disc in such a condition that the slider is capable of reciprocally displacing along its own displacing passage when the eccentric disc is driven. One of the link elements of the slider link motion mechanism is slidably engaged with the slider so that a swing motion about a fulcrum thereof is created. The other link element of the above-mentioned mechanism is mounted on the swing shaft and, therefore, a quick return motion of the reciprocal turning motion of the swing shaft can be created.