摘要:
A dental separator device for applying pressure against adjacent teeth to separate the teeth from one another so that a dental restoration can be made. The separator device increases the interproximal space between the adjacent teeth giving the dental clinician improved visibility and working space. The invention also encompasses a flexible matrix band used for making the restoration. The matrix band is wrapped around the tooth to define a desired mold or shape for the restoration.
摘要:
A dental separator device for applying pressure against adjacent teeth to separate the teeth from one another so that a dental restoration can be made. The separator device increases the interproximal space between the adjacent teeth giving the dental clinician improved visibility and working space. The invention also encompasses a flexible matrix band used for making the restoration. The matrix band is wrapped around the tooth to define a desired mold or shape for the restoration.
摘要:
A method and apparatus for supporting sheet material such as cloth during operations thereon such as cutting wherein a pattern is placed on a supporting surface provided with a plurality of pins extending through apertures in the surface, the pins are lowered below the surface for removal of the pattern whereupon sheet material is placed on the surface, typically a plurality of plies being layed up in a stack, and simultaneously the pins are moved through the sheet material to maintain alignment and matching of the plies in the stack. The pattern then is placed on the sheet material in a position determined by the location of the pins, and the material is shaped such as by cutting.A plurality of separate pin holding and supporting devices, each of relatively narrow width, are provided in spaced relation lengthwise along the apparatus and are independently movable lengthwise toward and away from each other. Each pin holding and supporting device includes a pin contacting component wherein a pin contacting surface is defined by a member mounted for limited movement and wherein another pin contacting surface is provided with a wear resistant coating. There is also provided an arrangement for moving the supporting devices to move the pins through the apertures between a position where the heads of the pins are spaced below the supporting surface and a position where the pins extend through the apertures and the heads of the pins are above the supporting surface so that the sheet material can be anchored thereon.
摘要:
An ergonomic handle mechanism for a cutting machine having a vertically reciprocating knife. The position of the handle between a horizontal orientation and an orientation at an angle thereto is adjustable for greater comfort as well as a longer working time without tiring so that greater productivity may be achieved. A link to which the handle is attached is pivotally mounted to a block which is fixedly attached to the machine housing. A pin having an eccentric portion received in a groove in the link is provided to determine handle position by the rotational position of the pin. A projection is provided on the block for limiting the pivotal movement of the link and thus acting as a stop in case of pin breakage.
摘要:
A package (10) for the storage and dispensing of a plurality of material 10as includes a first and a second longitudinally juxtaposed barrels (11, 12). Each barrel (11, 12) having a first and a second end (20, 21). Each first and second barrels (11, 12) having a quantity of at least one of the material 10as initially contained therein, and each barrel having an open end (20) and a dispensing end (21). A piston (40) is disposed in each barrel (11, 12) such that the material 10a in each barrel (11, 12) is initially positioned between the dispensing end (21) of the barrels (11, 12) and the respective ones of the pistons (40). A snap cap (23) is contiguously formed to initially close each of the dispensing ends (21) of the barrels (11, 12), such that the snap cap (23) may be broken from the barrels (11, 12) to thereby forming a secondary open end (31) at the dispensing end (21) of the barrels (11, 12), thereby facilitating the material 10a contained in each barrel (11, 12) to flow through and be dispensed.
摘要:
An end cutter includes a pair of rollers (64,73) operatively arranged to frictionally engage cloth passing through the nip thereof. One of the rollers is mounted for unidirectional rotation such that the cloth may be pulled forwardly from a roll, but cannot retract when such pulling force is released. The logic includes a pressure comparator and pneumatically-operated safety dump valve (92,94) for sensing whether the cutter (31) has encountered a motion-impeding obstruction on its forward cutting stroke, and automatically releases the force urging the cutter to move forwardly in such event. The cutter is mounted on a rodless cylinder (48).
摘要:
A method and apparatus for supporting sheet material such as cloth during operations thereon such as cutting wherein a pattern is placed on a supporting surface provided with a plurality of pins extending through apertures in the surface, the pins are lowered below the surface for removal of the pattern whereupon sheet material is placed on the surface, typically a plurality of plies being layed up in a stack, and simultaneously the pins are moved through the sheet material to maintain alignment and matching of the plies in the stack. The pattern then is placed on the sheet material in a position determined by the location of the pins, and the material is shaped such as by cutting. A plurality of separate pin holding and supporting devices of narrow width are spaced lengthwise along the apparatus and independently movable lengthwise toward and away from each other. Pins of adjacent rows can be closely spaced together thereby achieving a grid pattern wherein the pins are relatively closely spaced. There is provided apparatus for developing a positive pressure which is employed to apply a flotation force to sheet material on the surface to facilitate movement of the material along the surface, apparatus for developing a negative pressure which is employed to apply a hold down force to sheet material on the surface to facilitate operating on the material, and apparatus for controlling selection of positive or negative pressure so developed.
摘要:
A tip (10) for mixing a plurality of components and for dispensing the mixture. The tip is particularly suited for use with a bulk supply of the components (11). The tip is further particularly suited for the mixing and dispensing of reactive materials. The tip (10) includes a housing (32) having a stator (31) positioned therein. The housing (32) includes a plurality of feeder channels (20, 21) that correspond to outlet channels of the bulk storage device. At least one of the feeder channels (20, 21) has a length dimension such that it extends into the outlet channel of the bulk storage device to prevent cross-contamination of the components held within the bulk storage device.
摘要:
A package (10) for the storage and dispensing of a plurality of materials includes a first and a second longitudinally juxtaposed barrels (11, 12). Each barrel (11, 12) having a first and a second end (20, 21). Each first and second barrels (11, 12) having a quantity of at least one of the materials initially contained therein, and each barrel having an open end (20) and a dispensing end (21). A sealing plunger (40) disposed in each barrel (11, 12) such that the material in each barrel (11, 12) is initially positioned between the dispensing end (21) of the barrels (11, 12) and the respective ones of the sealing plungers (40). A snap cap (23) is contiguously formed to initially close each of the dispensing ends (21) of the barrels (11, 12), such that the snap cap (23) may be broken from the barrels (11, 12) to thereby forming a secondary open end (22) at the dispensing end (21) of the barrels (11, 12), thereby facilitating the material contained in each barrel (11, 12) to flow through and be dispensed.