Abstract:
An improved apparatus for molding thermosetting material, such as strips of uncured mill rubber or other thermosetting elastomers, includes a preheater assembly which preheats the thermosetting material to a temperature which is below its curing temperature. A movable pot receives at least a portion of a charge of the preheated strip material at a loading station. The pot is then moved to a discharge or unloading station where a ram assembly is extended to force the thermosetting material from the pot into a mold. The ram assembly is then retracted and the pot is returned to the loading station. The pot is then filled so as to contain a charge which includes both preheated strip material and thermosetting material which was not forced into the mold on the previous cycle of operation. The pot is cooled at the loading station to maintain thermosetting material in the pot at a temperature below its curing or setting temperature. As the pot is being loaded, a slide block applies pressure against the mold and heats the thermosetting material in the mold to a temperature above its setting temperature.
Abstract:
A table with a top that automatically lowers when a load on the table is heavy and automatically raises when the weight of the load is light. The table has pivoted supports between the top and a base of the table and these pivoted supports are pivotally joined to interconnecting leveling means. A series of springs connected to the supports engage at different heights of the top and smoothly urge the top upwardly from the base.
Abstract:
Components of stitchable material are color monitored, i.e., compared to ensure that they are the same color, and gauged or aligned prior to stitching the components together. The components, i.e., sections of shoe quarters are fed automatically from separate stacks thereof, photoelectrically color monitored while they are still separate, gauged and finally fed to a tandem sewing machine arrangement. If the components differ in color, or if only one component is fed from one stack, the components are automatically rejected.
Abstract:
Thermally curable material, such as rubber or plastic, is heated and molded under pressure about a mandrel in a split compression mold to form initially a partially cured hollow article with an opening therein through which the mandrel may be withdrawn with little or no elastic deformation or distortion of the article. The opening is defined by aligned molded edges that are spaced apart, but can be pressed together by segmental portions of the mold to close the opening after the mandrel is removed. The initial partial curing is to a degree such that the material can hold its shape in the mold and the edges can fuse and bond together if placed under pressure contact with each other. After the initial curing the mold closing pressure is relieved, the segmental portions of the mold are opened, and the mandrel is withdrawn from the article through the opening and from the mold. Closing pressure is immediately reapplied and the segmental mold portions are operated to force the aligned edges into contact under sufficient pressure to cause them to fuse and bond together in sealing relation. Heating in continued with the mold in this latter operating condition until the material is fully cured. The mold is then opened and the article stripped therefrom. A specialized mold and mandrel are used for forming the aligned edges and for pressing these edges together. Concavities in the cavity wall receive some of the molded material which temporarily hold the article walls in firm contact with the cavity walls during withdrawal of the mandrel. The material in the concavities is stripped free therefrom readily upon stripping the cured article from the mold.
Abstract:
Uncured elastomeric material to be molded into a tire tread is fed progressively from a fixed feed station into a radially outwardly open mold cavity extending partway about the periphery of a cylindrical mold member as the member is rotated about its axis. When charged, the rotation is stopped and one or more mold sections complementary to the member are moved to closed position relative to the cavity and applied under molding pressure. While so applied, the member and sections are heated to cure the molded charge. Upon completion of the curing operation, the mold is opened, the cylndrical mold member rotated, and the molded strip is stripped progressively endwise from the cavity at a fixed discharge station. During stripping, a succeeding charge is fed progressively into the cavity, and, at the end of the stripping step, the operation is repeated. The material may be delivered to the cavity as a prepared strip of raw material at room temperature or extruded directly by an extruder into the cavity at elevated extruding temperature. A plurality of like molds may be arranged to be charged successively from a single extruder so that each mold can be stripped and charged while curing is being effected in the others, thus rendering the production of threads substantially continuous.
Abstract:
A surgical device, such as may be used in performing emergency tracheotomies, including an elongate handle and an arm pivotally connected thereto intermediate its ends. The arm and handle have a pair of adjacent ends which move toward and away from each other on relative swinging of the arm and handle about their pivot connection. A first blade is secured to one of the adjacent ends and a second blade is secured to the other. The first blade has a sharpened end spaced outwardly from the handle and sharpened, opposed, diverging edges extending from the sharpened end toward the handle. The second blade is adapted to rest in face-to-face contact with the first blade when the adjacent ends of the arm and handle are moved together. The blades when in this position define an integral cutting element. The other ends of the arm and handle include portions which may be gripped by an operator and squeezed toward each other, with such urging the two blades to move apart and spreadthe edges of a cut made by the integral cutting element formed by the two blades.
Abstract:
An improved apparatus for molding thermosetting material, such as strips of uncured mill rubber or other thermosetting elastomers, includes a preheater assembly which preheats the thermosetting material to a temperature which is below its curing temperature. A movable pot receives at least a portion of a charge of the preheated strip material at a loading station. The pot is then moved to a discharge or unloading station where a ram assembly is extended to force the thermosetting material from the pot into a mold. The ram assembly is then retracted and the pot is returned to the loading station. The pot is then filled so as to contain a charge which includes both preheated strip material and thermosetting material which was not forced into the mold on the previous cycle of operation. The pot is cooled at the loading station to maintain thermosetting material in the pot at a temperature below its curing or setting temperature. As the pot is being loaded, a slide block applies pressure against the mold and heats the thermosetting material in the mold to a temperature above its setting temperature.
Abstract:
An improved apparatus for molding thermosetting material, such as strips of uncured mill rubber or other thermosetting elastomers, includes a preheater assembly which preheats the thermosetting material to a temperature which is below its curing temperature. A movable pot receives at least a portion of a charge of the preheated strip material at a loading station. The pot is then moved to a discharge or unloading station where a ram assembly is extended to force the thermosetting material from the pot into a mold. The ram assembly is then retracted and the pot is returned to the loading station. The pot is then filled so as to contain a charge which includes both preheated strip material and thermosetting material which was not forced into the mold on the previous cycle of operation. The pot is cooled at the loading station to maintain thermosetting material in the pot at a temperature below its curing or setting temperature. As the pot is being loaded, a slide block applies pressure against the mold and heats the thermosetting material in the mold to a temperature above its setting temperature.
Abstract:
A camera comprising an image stage and an object stage each mounted to opposite ends of a camera frame and adjustable relative thereto by means of a set of three spaced apart image stage micrometer means and a set of three spaced apart object stage micrometer means. The image stage and object stage micrometers are located at the vertices of imaginary equilateral triangles, with the defined image stage triangle rotated 60* relative to the defined object stage triangle whereby certain of the image stage and object stage micrometers may be cooperatively adjusted to facilitate focusing of the image. There is also provided a fiber-optic light guiding means having flattened and flared ends for directing light into the side edges of the slide; a light source comprising parabolic and spherical reflectors for developing a high intensity-low heat light source for the fiberoptic means; and polarizing filter means mounted between the fiber-optic light source and the edges of the autoradiographical slide and in the optical path between the slide and the lens system to provide means for maximizing the resolution of light reflected from the slide specimen.
Abstract:
The invention relates to a unit which is readily attached to and detached from a golf club shaft to provide a visual self-analysis of one''s own golf swing. It consists of a golf club having removably secured to its hosel a snap fitting attachment carrying a light source directing a light beam upwardly, a hosel entrance opening on said attachment is positioned on the rearward side of said hosel.