Abstract: A plastic bucket having a lip which defines means for engaging a bucket lid in sealing relation. The interior wall of the bucket defines an annular, inwardly projecting ridge spaced from the lip. The ridge extends around the inner circumference of the bucket, and defines an annular, inwardly pointed apex, to provide increased hoop strength to the bucket adjacent to its mouth and to provide an internal brush wiping member within the bucket.

Abstract: A plastic bucket having a lip which defines means for engaging a bucket lid in sealing relation. The interior wall of the bucket defines an annular, inwardly projecting ridge spaced from the lip. The ridge extends around the inner circumference of the bucket, and defines an annular, inwardly pointed apex, to provide increased hoop strength to the bucket adjacent to its mouth and to provide an internal brush wiping member within the bucket.

Abstract: A gate for a mold comprises a molding compound inlet conduit for communication of molding compound to the mold cavity. A plunger member is slidably mounted adjacent the inlet conduit and adapted to prevent flow through the conduit in a first sliding position and to permit flow through the conduit in a second sliding position. The plunger defines a slidable shaft and an enlarged end proportioned to prevent the flow through the conduit in the first position. The enlarged end defines a mold cavity-facing surface of larger area than the opposed surface on the enlarged end, which opposed surface communicates with the conduit. Accordingly, pressurized molding compound presses against the opposed surface, to spontaneously open the plunger into a second sliding position to admit molding compound to the mold cavity. Upon essential equalization of the pressures in the mold cavity at the conduit, the plunger is spontaneously moved hydrostatically to its first closed sliding position.

Abstract: A gate member for admitting plastic material into a mold which comprises a hollow member defining a bore having a longitudinal axis and an inner wall for separating the bore from a mold chamber positioned between mold halves. Aperture means extends through the inner wall, being peripherally spaced from the longitudinal axis and preferably defining an angle of essentially 30.degree. to 60.degree. to the longitudinal axis, diverging outwardly in the direction of the mold chamber. Also, preferably, the inner wall defines a centrally-positioned peak pointing toward the bore and having sloping sides, to assist in directing molten plastic toward the peripherally spaced aperture means. Also, rib means may be provided, pointing inwardly and extending radially from the central portion of the inner wall toward the periphery thereof, to reinforce the inner wall.

Abstract: A collapsible mold core comprises an inner core member defining opposed first and second ends. The inner core member tapers transversely to a reduced diameter from the first to the second end. A plurality of outer core members are attached to the lateral exterior of the inner core member in longitudinally slidable relation to it between first and second sliding positions. The outer core members define first and second ends corresponding in position to the first and second ends of the inner core member, with the outer core members tapering inwardly in transverse dimension from their second to their first ends to provide an opposite taper to that of the inner core member. The mold core is of lesser transverse diameter in the second sliding position than in the first sliding position. This permits the molding of an object such as a straight-walled bucket having an inwardly-projecting lip about the mold core while it occupies the first sliding position.

Abstract: A simultaneously molded threaded port and plug may be produced by a mold which comprises a first cavity for receiving molding compound to form a wall, a second cavity for receiving molding compound to form the threaded plug, and rotatable shaft means carrying external thread forming grooves and extending through the first cavity to define the threaded port. The shaft means terminates at the second cavity, with an end portion of the shaft being shaped to form a separable mechanical linkage between the end portion and the plug molded in the second cavity means. The shaft is rotated after molding to withdraw it from the molded, threaded port, and to rotate the molded, threaded plug into the threaded port for sealing thereof.

Abstract: A plastic bucket lid is adapted for removable attachment adjacent its periphery to a bucket. The lid defines an annular open depression adjacent its periphery, and, positioned outwardly from the depression, an annular locking slot for receiving and holding the lip of a bucket. In accordance with this invention, radially-positioned reinforcing fins are carried by the lid within the annular, open depression to restrict the flexing of its outer wall. This, in turn, has been found to reduce the tendency of the lid to be knocked off of a bucket upon being dropped or the like. Preferably, an outwardly positioned annular projection is placed in the locking slot which defines an angle of 80.degree. to 100.degree. to the plane of the annular walls defining the locking slot for improved retention of the lid to the bucket.

Abstract: The following specification describes a paint can mold in which a pair of concentric ring members and cores at diametrically opposed positions create concentric mold cavities for forming projecting bushings on the pail, each having a concentric handle bearing. The plastic for forming each bearing and a handle interconnecting the bearings passes through a gate in each ring member. Withdrawal of the ring member severs the plastic in the gate from between the bushing and bearing so that the handle is free to rotate on the bushings. Means are provided to prevent disassembly of the handle from the can.

Abstract: A stop boss formed on the handle of a pail may be simultaneously molded along with the pail and its handle by means of a pair of pivotable members which have free ends abutting together in a first pivoting position, and which are spaced from each other in a second pivoting position. The free ends cooperatively define between them a mold cavity for forming the stop boss on the rotatable handle. The pivotable members are adapted to occupy their first pivoting position while the mold assemblies close, and to pivot into the second, open pivoting position upon opening of the mold assembly and removal of the molded part to facilitate removal of the stop boss.

Abstract: The following specification describes a paint can mold in which a pair of concentric ring members and cores at diametrically opposed positions create concentric mold cavities for forming projecting bushings on the pail, each having a concentric handle bearing. The plastic for forming each bearing and a handle interconnecting the bearings passes through a gate in each ring member. Withdrawal of the ring member severs the plastic in the gate from between the bushing and bearing so that the handle is free to rotate on the bushings. Means are provided to prevent disassembly of the handle from the can.

Abstract: A half-section of a cassette casing having an embedded transparent wafer serving as a viewing window. The cassette casing section is formed by shearing the wafer from an elongated strip of transparent material, disposing and supporting the wafer within a cavity, and forcing a plasticized material into the cavity where it solidifies. The cavity is defined in an injection mold comprising a pair of relatively movable cavity plate assemblies with which are associated means for shearing and supporting the wafer.

Abstract: The following specification describes a stop boss formed on the handle of a pair by means of a pair of slides located behind a skirt wall of the pail with the handle passing through a slot in the skirt wall, which is closed by a flange wall formed by the slides. The slides are movably carried in guides by a ring member and are received in a recess of another ring member which conventionally forms the annular pail wall. The guides enable the slides to move laterally toward each other in response to downward movement of the carrying ring member, to define the cavities for forming the stop boss and the flange wall closing the skirt wall slot. On completion of the mold cycle and upward movement of the ring member carrying the slides, the guides move the slides laterally apart to release the stop boss and the flange wall. The slides are then moved from between the skirt and pail walls to enable the pail to be released from the mold.

Abstract: The following specification describes a dispensing drawer assembly having a housing in which a passage is formed to permit material in a container to fall upon a bridge wall spaced from the passage. The periphery of the passage is sealed by spaced partition walls of the drawer when in the closed position and metering walls between the partition walls are optionally broken out to control or select the quantity of material deposited on the bridge wall.On movement of the drawer to an open position, the rear partition wall scrapes the selected quantity of material on the bridge wall through a passage for capture by a container, while a top closure wall on the drawer seals the passage to prevent the entrance of contaminants into the container.

Abstract: A half-section of a cassette casing having an embedded transparent wafer serving as a viewing window. The cassette casing section is formed by shearing the wafer from an elongated strip of transparent material, disposing and supporting the wafer within a cavity, and forcing a plasticized material into the cavity where it solidifies. The cavity is defined in an injection mold comprising a pair of relatively movable cavity plate assemblies with which are associated means for shearing and supporting the wafer.

Abstract: A locking mechanism is provided for locking the upper and lower portions of a stamping die together when the die is out of press and releasing the upper and lower portions of the stamping die from locking engagement with each other when the stamping die is in press. The mechanism includes an elongated lockbar operatively associated with a spring-biased safety pin and a fixed pivot pin in the upper portion of the stamping die. A vertical leader pin projects upward from the lower portion of the stamping die into a bushing mounted in the upper portion of the stamping die and includes an undercut portion forming a locking surface for cooperative locking and releasing engagement with the lockbar in response to movement of the safety pin which senses whether the stamping die is in press.

Abstract: A vending machine including a vibrating mechanism or thumper mechanism for vibrating a container of powdered material, said vibrating mechanism including a pivotally mounted spring-biased arm member actuatable to a cocked position by the movement of a slide mechanism and releasable to apply a blow to the container said vibrating mechanism and slide mechanism having interengageable portions for effecting movement of the arm member to the cocked position.