Abstract: The device for the opening and mixing of fiber bales contains a bale opening device capable of being lowered on a bale suspended from a bridge-like machine frame which is fashioned in the form of a portal and is capable of travelling along a guide rail, said bale opening device being equipped with a conveying device. A bale opening roll or plucker roll (6) is provided as the bale opening device, its axis of rotation being perpendicular to the direction of movement of the machine frame and its working width being at least 75% of the total width of the machine frame. A suction channel (9) fixedly installed above the bales (B) serves as the conveying device for the fiber material taken from the bales (B).The device is of simple construction and has a usable opening width essentially equal to its overall width and makes it possible to achieve good fiber mixing.

Abstract: In a fiber removing roll 1 for a bale opener, the teeth 2 are removably attached on the circumference of the roll. They are provided with a contact surface 21 adapted to the circumferential contour of the fiber-removing roll and are held on the contour by screws screwed into pegs 4. The teeth are thus attached securely and can be replaced easily. In order to provide the teeth with a secure hold, independently of manufacturing tolerances, the contact surface is reduced to two contact shoulders 22, 23 spaced at a distance from each other.

Abstract: A draw frame of a sliver-drafting apparatus has three cascaded roller pairs whose lower rollers are driven by respective motors at speeds determined by associated frequency dividers and/or multipliers in the output of a common oscillator of adjustable operating frequency. The slivers drafted by the roller pairs form, after doubling or plying, a fiber bundle traversing a thickness sensor whose output, integrated over predetermined time periods, is used by a microcomputer to ascertain optimum nip-line spacings and contact pressures reducing the thickness variations to a minimum.

Abstract: A draw frame of a sliver-drafting apparatus has three cascaded roller pairs whose lower rollers are driven by respective motors at speeds determined by associated frequency dividers and/or multipliers in the output of a common oscillator of adjustable operating frequency. The slivers drafted by the roller pairs form, after doubling or plying, a fiber bundle traversing a thickness sensor whose output, integrated over predetermined time periods, is used by a microcomputer to ascertain optimum nip-line spacings and contact pressures reducing the thickness variations to a minimum.

Abstract: In a pneumatic gripper for bobbin changer devices with an elastically deformable collar in the gripper housing, the gripper housing (2) and the collar (3) are of bell-shaped construction. The collar (3) is inserted into the gripper housing (2). The collar (3) overlaps the edge (20) of the gripper housing (2) and is pressed airtightly against the edge (20) by means of a screw collar ring (4). The gripper can be produced with a simple construction and cheaply and retains the cop with directional stability.

Abstract: A method and apparatus for changing bobbins in a flyer spinning frame which includes a bobbin rail for supporting bobbins adjacent the flyers movable both vertically and tiltably, the bobbin rail being moved sequentially from an upper bobbin winding position, a lower horizontal position, a forwardly tipped position, then upwardly in the tilted position into a comfortable bobbin doffing position, downwardly into the lower position, back into a horizontal position while in the lower position then finally upwardly into the upper bobbin winding position.

Abstract: There is provided herein an automatic can changing device for spinning preparation machines such as for drawing frames, carding or combing machines in which a stationary conveyor is provided that is associated with a fiber lap delivery station, with mechanism for removing empty cans from the conveyor and presenting them to the fiber lap delivery station for the filling operation and thereafter removing these filled cans from the fiber lap delivery station and depositing them in an intermediate station preparatory for introduction to movable carriages also being shown.

Abstract: A mechanism for rotating a cannister during the filling of the cannister with textile material from a carding machine or the like which includes a turntable rotatably mounted on a frame for supporting a cannister having a movable bottom including a plurality of flexible metal bands arranged on the frame for reciprocating movement between a retracted and an extended position with upper end portions in angularly disposed relationship, the upper ends of the bands secured together for underlying engagement with the cannister bottom and the adjacent side edges of the bands provided with releasable interlocking means engageable during the movement of the upper portions of the bands into the extended position to form a pillar together with drive means for moving the bands between the retracted and extended positions to permit downward movement of the cannister bottom during the filling of the cannister with textile material.

Abstract: A mechanism for rotating a cannister during the filling of the cannister with textile material from a carding machine or the like which includes a turntable mounted on a rotatably driven housing, the turntable being arranged to support a cannister having a movable bottom, a spiral spring having a lower end positioned in the housing with a support member on its upper end in underlying engagement with the cannister bottom for urging the bottom into an upper position together with a power driven winch disposed in the housing having a cable connected to the support member for lowering the cannister bottom downwardly against the force of the spring during the cannister filling operation.

Abstract: Disclosed is a cannister rotation mechanism for use in combination with a fiber carding or drawing frame having a turntable arranged to deliver fiber into the cannister. Reciprocable means are shown for raising and lowering the movable cannister bottom into position to receive the fiber and later to remove the filled cannister and insert a new cannister for filling. Several embodiments of the reciprocable means are shown and described.