Abstract: A cable tie having a locking head and a strap terminating in a tip is formed by injecting plastic material into a mold cavity defined by a first mold part that includes a head region defining a portion of the head and a second mold part that includes a tip region defining a portion of the tip. Upon initial separation of the mold parts a portion of the head is retained in the head region of the first mold part and a portion of the tip is retained in the tip region of the second mold part. Upon further separation of the mold parts, the tip is still retained in the tip region of the second mold part and the head is removed from the head region of the first mold part. Subsequently, the tip of the cable tie is ejected from the tip region of the second mold part.

Abstract: Square and octagonal building elements for a set of toy building elements that are capable of being inteconnected in a releasable engagement both side-to-side and top-to-bottom. The side walls of the building elements include a groove and/or a split flexible tongue that is compressed when frontally forced into a groove in another such building element to effect a releasable restraining frictional engagement within the groove.

Abstract: A cable tie having a locking head and a strap terminating in a tip is formed by injecting plastic into a mold cavity defined by first and second mold parts. The first mold part includes head and tip regions respectively defining portions of the head and the tip. The first and second mold parts define a strap region for forming a portion of the strap that extends between the head and the tip. Upon initial separation of the mold parts, portions of the head and the tip are retained in the head and tip regions of the first mold part and a portion of the strap is retained in the second mold part to thereby remove the tip and the head from the second mold part and portions of the strap from the mold parts. Upon further separation of the mold parts some previously retained portions are thereby removed.

Abstract: A building element for a set of toy building elements that are capable of being interconnected in a releasable engagement includes side walls having grooves and tongues, a top having a broad surface that extends toward the side walls and a primarily cylindrical projection extending above the broad surface; a open bottom; and an interior having a plurality of ribs with contact surfaces that are accessible through the open bottom and disposed for interconnecting with the projection on the top of another such building element. At least some of the contact surfaces of the interior ribs include lateral indentations; and the projection includes a circular lateral ridge disposed above the broad surface for being interconnected in a releasable restaining engagement within the indentations in the interior contact surfaces of the ribs of another such building element.

Abstract: A building element for a set of toy building blocks that are capable of being interconnected in a releasable engagement includes a box with side walls, a top having one or more projections, and an open bottom providing access to interior surfaces for frictional engagement with the top projection(s). The side walls includes a plurality of grooves having entry openings of a given predominant width and a plurality of tongues having distal portions of a predominant width that is greater than the given predominant width of the groove entry openings for interconnecting in a releasable restraining engagement with grooves in another such building element. The tongues are flexible and split longitudinally into sections so that the tongues can be compressed laterally in order to effect the restraining engagement by frontally pressing the tongues into the grooves. The tongues can also be disengaged from the grooves by sliding the tongues from one end of the grooves.

Abstract: In a method of injection molding an elongated article, such as a cable tie, having a head and a strap terminating in a tip, (a) the article is formed by injecting molten plastic material, such as nylon, into a mold cavity defined between a first mold part and a second mold part, wherein the first mold part includes a head region defining a portion of the head of the elongated article, the second mold part includes a tip region defining a portion of the tip of the elongated article, and the portion of the mold cavity defined by the second mold part defines a series of pointed teeth on one side of the strap; (b) the first mold part is separated from the second mold part while retaining the portion of the head of the elongated article in the head region of the first mold part and the portion of the tip of the elongated article in the tip region of the second mold part, thereby separating the head from the second mold part, the tip from the first mold part, and a major portion of the strap of the elongated articl