Abstract: An effective, low cost block and brace assembly having utility in the art of tilt-up construction. In the assembled relationship, the block and brace form a right triangle to provide maximum support for a mold form during the pouring of concrete and the subsequent formation of a precast panel.

Abstract: This invention is related to an improved technique for destructing chills. A novel tool, preferably in the form of a piston cylinder mechanism is introduced into the cavity of the chill, said tool comprising at least two reciprocally movable parts which are set in motion relative to each other in the cavity so as to squeeze apart the walls of the chills or portions thereof.

Abstract: A mold base supporting mold cavity plates for movement between open and closed positions and having an ejector mechanism movable between ejecting and retracting positions relative to one of the mold cavity plates includes an ejector retraction mechanism for moving the ejector mechanism to its retracted position relative to the one mold cavity plate before the cavity plates reach a predetermined position during the mold closing cycle and for releasably retaining the ejector mechanism in its retracted position until the mold base opens to a predetermined position.

Abstract: A mold for rotational casting of plastics is disclosed. The mold is formed in two mating sections with one section having a raised tongue and the other having a groove disposed to receive the tongue. The mold sections have flat faces fitting together in sealing engagement. A channel is formed in one of the flat faces around the tongue, and aperture means are provided to communicate the channel with the outside of the mold. Also, additional aperture means are provided to connect the groove with the outside of the mold. Thus, entrapped gases are preferentially vented to the outside of the mold rather than inwardly where they could deform cast parts.

Abstract: An aperture forming device is provided for making openings such as tubular holes in concrete or the like during pouring thereof. The device utilizes a tube holder secured to a concrete form; a disposable tube attached to the holder and a cap member at the other or free end of the tube. Concrete is poured around the tube on the form and, after the concrete has set, the form, tube holder and tube may be pulled out of the concrete leaving the tubular aperture. A plurality of the devices can be combined in a pattern to form openings of various shapes.

Abstract: The disclosure relates to an ejector pin retracting means for plastic molding dies and die cast molds; the retracting means being commonly known as an early return system for retracting ejector pins into a mold cavity into flush relationship with a surface thereof before a conventional laterally moving slide mechanism is actuated, and thereby preventing the slide mechanism from hitting the extended ejector pins and causing damage thereto. The invention comprises resilient means operable by a return rod, the resilient means being engageable by the rod and resiliently expandable to permit the rod to pass therethrough after the rod has applied sufficient force to the resiliently expandable means so as to retract the ejector pins into one of the mold cavities and into flush relationship with an inner surface thereof.

Abstract: Apparatus used in candle manufacture including means for dispensing and holding a length of wick material threaded through an upright needle, and means for clamping a candle mold in surrounding relation to the needle and wick material. After the candle hardens in the mold it is removed from the needle and the wick material remains in the candle.

Abstract: Process for sealing a block formed of a piling of spaced plates while preserving passageways between several plates and on at least one edge of the block, comprising inserting into the intervals between said plates the teeth of a comb adapted to substantially fill these intervals, casting a solidifiable material on said edge and withdrawing the comb after the casting operation, said teeth being made of a non-adhesive material with respect to the solidifiable material of the casting. This process and the resulting sealed blocks are particularly useful in the field of fuel cells.

Abstract: A ply joint bar for casting a seamless ceiling from a hardening material such as plaster or concrete, poured over the surfaces of adjacent molding panels, has a bridge with a lower surface resting on and flush with two such adjacent panels and an upper gable-like portion adapted to be anchored in the hardened casting material, an optional base member with two adjacent coplanar surfaces which grasp the underside of the panels, and a leg frangibly connected at one of its ends to the bridge and permanently connected at its other end to the base member, so as to separate adjacent panels sandwiched between the bridge and base member. After the casting material hardens, the molding panels are removed and the frangible leg separated from the bridge leaving a substantially seamless ceiling surface with the bridge embedded therein and its lower surface flush therewith.

Abstract: A holder adapted to support an anchor bolt in a position for partial embedding in concrete poured into a form to which the holder is pre-secured; the holder comprising a generally fork-shaped body having elongated, side-by-side legs connected together at one end in spring relation, and means securing the legs of the body to a form to overhang the concrete with the anchor bolt frictionally gripped between such legs; the legs being formed, on adjacent sides, with registering notches in which the anchor bolt is engaged.