Abstract: A feed hopper assembly particularly adapted for feeding particulate material which agglomerates has, end walls and side walls which define a storage chamber having a charging opening for the particulate material, and the side walls converge to form a discharge outlet for dispensing the particulate material. A pulsating diaphragm assembly including, an elastomeric member on the inner wall of the storage chamber, and pump means for causing the elastomeric member to expand the deflate. A transverse shelf or surface adjacent the discharge outlet can be provided for delivering the particulate material to a point of use. Bleed means can also be provided to bleed air from the pulsating diaphragm assembly in the event that pulsations terminate when the diaphragm assembly is in the expanded condition.

Abstract: The method of transporting an electrostatic strip wherein the strip on a supply roll is pulled from the supply roll which is normally freely rotatable and the strip having been pulled from the supply roll is returnable to the supply roll by driving the supply roll in reverse to rewind the electrostatic strip; the unspooling of the electrostatic strip from the supply roll is performed by a pair of feed rollers; after imaging the electrostatic strip, it is carried between a pair of longitudinally ribbed guides past a magnetic toner to an inspection station at which station it may be viewed and optionally severed from the remainder of the electrostatic strip, which remainder is returned toward the supply roll for neutralization, detoning, reimaging and refeeding to the viewing station, while the portion of the electrostatic strip at the viewing station is carried in a generally horizontal planar course to a fuser for making permanent the toned, unfused electrostatic image.

Abstract: A leader pin to securely hold the leading end of a strip for high speed unwinding wherein the end of a strip is inserted in a slot in a body and a keeper is inserted in the body embraced by the end of the strip; the keeper is provided with a resilient latch that is engageable with a channel on the body whereby the body and the keeper are strongly engaged together.

Abstract: An electrostatic display, recall or print apparatus in which a magnetically toned latent electrostatic pattern or image on an electrostatic strip is inspected, and either advanced to a fusing station for being made permanent, or withdrawn to a detoning station for magnetic detoning, from which the strip may once more be advanced and reused for the application of a different electrostatic image and for retoning.

Abstract: An electrostatic display, recall or print apparatus in which a latent electrostatic pattern or image is formed on a dielectric strip; the image is toned (made visible by dusting with an electrostatic powder) and is advanced to a display station where it is viewed; if the image is acceptable, the strip is advanced to a fusing station and made permanent; if the image is not acceptable, the strip is withdrawn, the electrostatic image is neutralized and the toner is removed.

Abstract: A film gate for being received in a cassette which holds a film strip for projection therefrom; the gate provides stationary tapered guides against which a strip not lying precisely in a preselected focal plane, is cammed toward the preselected focal plane by the tapered guide fingers; an opposed movable guide on a movable portion of the film gate opposite to the stationary guide is provided with arcuate guide fingers to prevent the cammed film strip from moving away from the preselected focal plane.

Abstract: A leader pin, providing a slotted rod received in a tube, with a first fin on the rod positioned to prevent a strip in the slot from moving transversely; and a second fin on the rod to prevent the tube from disengaging from the rod.

Abstract: A leader-pin to securely hold the leader of a film strip or magnetic tape for high speed unwinding and rewinding wherein the end of the film strip or magnetic tape is inserted between a split rod and the split rod is then inserted into an elongated, resilient tube, with the end of the strip protruding from an elongated slit in the tube; the tube frictionally engaging the strip and the rod, so that the strip will not slip out of the leader-pin.