Abstract: An apparatus for controlling the working conditions between two rotating cylinders equipped with a point clothing wherein complete elimination of the disturbing influences of the centrifugal force and the increase in temperature of the cylinders onto the working conditions is achieved.

Abstract: In a pneumatic system for supplying air-borne fibers to the vertical feed chutes of carding machines and the like, the fibers which collect in the lower, formation section of each chute, are adapted to be compacted by a volumetric air pump that is mounted in each chute to direct pulses of compressed air into the upper end of its formation section. The density of the column of fibers in this section is monitored by apparatus which senses the air pressure differential between the upper and lower ends, respectively, of the formation section, and which generates an electrical signal proportionate to the pressure differential. This signal controls the operation of the variable speed electric motors which drive the air pump and a feed roll, which draws fibers from the upper, surge section of the chute and feeds them downwardly to the formation section.

Abstract: For controlling the output and the silver density in a carding machine, lot-specific data are determined, then fed into a memory from which the data may be recalled at will and applied to the control of the carding machine.

Abstract: A control system for use in textile processing equipment including a card and a chute feed delivering a batt of fiber thereto. The operating speed of the card is sensed to generate a signal that is used to drive the motor for the oscillating densification plate and the feed roll of the chute feed at speeds having a predetermined ratio of the operating speed of the card. The weight of the batt formed by the chute feed is sensed and a signal is generated in proportion to the sensed weight, and this signal is used to override the primary drive for the oscillating plate and thereby vary the ratio between the operating speed of the card and speed of oscillation of the plate. The chute feed includes a device for sensing the level of accumulated fiber in the chute feed, and this device generates a signal that is utilized to override the primary drive for the feed roll of the chute feed and thereby vary the ratio between the operating speed of the card and the speed of such feed roll.

Abstract: The working conditions between two rotating cylinders (4,5), which are provided with a point clothing (9,19) and are processing or mutually transferring a fibre web, of a processing machine of the staple fibre spinning plant are always maintained on a predetermined value by adapting the distance between the surfaces of the two cylinders (4,5). For this purpose moving means (21) are used, which permit very precise setting of the distance between the rotational axes (8,14) of the two cylinders (4,5), and which are controlled by control means (22). To the control means (22) the measuring signal of a characteristic directly connected with the diameter of one of the cylinders (4 or 5), as scanned by a measuring element (25), is transmitted, and the control means (22) control the moving elements (21) in function of this characteristic. Thus complete elimination of the disturbing influences of the centrifugal force and of the increase in temperature of the cylinders onto the working conditions is achieved.

Abstract: In this pneumatic feeding system fibers are conveyed by air to surge sections formed in the upper ends of vertical branch ducts. Two sets of feed rolls are mounted in the midsection of each duct beneath the lower end of its surge section to feed fibers downwardly onto a kicker roll, which opens the fibers and directs them downwardly through a tapered duct section and onto a rotating screen condenser which is mounted in the lower end of each vertical duct. The fibers are withdrawn in a uniform layer from each screen by a doffer roll, and are fed to the feed assembly of a web forming machine. In one embodiment the density of the fibers in the surge section of a duct is controlled by selectively admitting atmospheric air to the duct adjacent its midsection, while in another embodiment this control is effected by adjusting the rate of flow of air in a closed air flow system.