Abstract: A plasticating extruder in which the screw conveyor includes an inner backfeed passage communicating with the channel established by the main flight of the screw conveyor and a solids-directing flight for directing unplasticated material into the backfeed passage and segregating already-plasticated material from the unplasticated material in the channel.

Abstract: Teaching apparatus enabling a reviewer to review items of information to be learned by the reviewer in accordance with a prescribed routine of repetitive review of a plurality of information-bearing slips so that the review of unlearned items is more frequent than the review of learned items, the apparatus including a plurality of classification cards defining grades and classes within the grades, a tablet in the form of a board having delineated areas for separating the slips into groups which will be reviewed more frequently or less frequently, depending upon whether or not the item carried by a slip is known at the time of a particular review, and a holder for the slips, the holder being capable of holding a group of slips in a stack of variable height and enabling sequential review and removal of each slip from the stack of slips for placement on the tablet.

Abstract: An enclosure arrangement for use in connection with a boot whereby a booted foot will be warmed selectively by a warming device placed within a chamber placed above an apertured instep portion of the boot.

Abstract: A cleaning apparatus includes a mop with a rotatable wiper, a pail having a reservoir for cleaning liquid, and a motor-driven wringer mounted upon the pail for receiving and rotating the wiper of the mop at relatively high speed to extract cleaning liquid together with entrained dirt and other matter from the wiper and return the extracted liquid to the reservoir.

Abstract: A hanging implement is attached to a garment bag for facilitating handling the garmet bag during hanging the garment bag upon a support and removal of the garment bag from the support, the hanging implement having a handle with a handgrip portion and a flange portion, the flange portion including a stop shoulder for providing an abutment for a hand when the hand is placed upon the handgrip portion for lifting the garment bag during hanging and removal, the flange portion further providing a display surface for displaying information capable of being viewed readily when the garment bag is hung upon the support.

Abstract: A system for handling tubular containers includes apparatus for unloading the tubular containers from incoming cases within which the tubular containers are arranged in freely stacked rows, the apparatus including a pusher member for engaging the exterior of each container in a row of tubular containers and pushing the tubular containers from each case in row-by-row sequence at a level elevated relative to a selected delivery point, and a delivery ramp for receiving the pushed rows of tubular containers and enabling the tubular containers to descend to the delivery point in appropraite order and alignment. The cases have a slot-like access opening for the pusher member and an opposite egress opening for allowing each row of tubular containers to emerge from the case in response to actuation of the pusher member.

Abstract: Method and apparatus in which a selected coating is applied to specific surfaces within a plasticating extruder to change the coefficient of friction between the solids being conveyed in the extruder and the specific surfaces in such a way as to improve solids conveying and thereby increase the production effectiveness of the extruder.

Abstract: Apparatus and method in which the temperature of the barrel inner surface and the temperature of the screw conveyor outer surface of a plasticating extruder are varied, alternately, in repeated steps, independent of one another along at least a portion of the solids conveying zone of the extruder, while a production effectiveness parameter simultaneously is monitored, until the monitored production effectiveness parameter is optimized and the production effectiveness of the extruder is at a desired maximum.

Abstract: A salt grinding process for comminuting crude pigments in which corn syrup, corn syrup solids or molasses are added to a blend of crude pigment and salt to permit the process to be carried out in a continuous process as well as in a batch process with less expended energy and less salt than when the corn syrup or molasses is not present.

Abstract: A plasticating apparatus operates continuously to plasticate material which is delivered intermittently to a molding device, the plasticating apparatus including a first screw conveyor which rotates in a barrel, a backfeed passage within the first screw conveyor and a second screw conveyor in the backfeed passage arranged to recirculate material in a circuit extending back through the backfeed passage. The first screw conveyor reciprocates axially so that during periods of non-delivery of plasticated material, the capacity of the circuit is increased to accommodate the accumulation of added plasticated material generated by the continuous rotation of the first screw conveyor.

Abstract: Diazotype developing apparatus and method in which a gaseous developing medium, such as a mixture of ammonia and air of predetermined concentration, is contained within a containing system, which includes the developing chamber of the apparatus, and the volume of the containing system is variable with only negligible changes in the pressure within the containing system so as to allow the volume of gaseous developing medium to be maintained within the containing system at essentially the same pressure as the pressure of the surrounding ambient atmosphere during variations in the volume of gaseous developing medium within the containing system resulting from operation of the apparatus.

Abstract: A maternity clothing garment having a body portion comprising leg or skirt regions and a waist portion having a relatively vertically larger panel of elastically expansible and conformable ribbed knitted material extending circumferentially along the waist portion at the front of the garment, and a relatively vertically smaller panel of elastically expansible and conformable ribbed knitted material extending circumferentially along the waist portion at the rear of the garment, whereby the panels will conform to the shape of the wearer.