摘要:
A length of fastener stock 111 includes opposing first and second continuous side members 113-1 and 113-2 which are coupled together by a plurality of flexible cross-links 117. Individual fasteners 121 are selectively obtained from the stock 111 by cutting or separating the side members 113-1 and 113-2 at appropriate points (i.e., midway) between the cross-links or filaments 115. Accordingly, each fastener 121 will include a first cross-bar 123-1, which has been cut from side member 113-1, and a second cross-bar 123-2, which has been cut from side member 113-2, the cross-bars 123-1 and 123-2 being interconnected by the flexible filament 115. Suitably, with respect to an axial cross-section thereof, the width W of the flexible filament 115 is greater than or equal to approximately one and a half times the height H of the filament 115.
摘要:
According to one embodiment, the plastic fastener comprises a flexible filament having a length of about 4.3 mm and a tensile strength of about 2 pounds, a first transverse bar located at one end of the flexible filament, and a second transverse bar located at the opposite end of the flexible filament. The fastener clip, which preferably does not contain a runner bar, comprises a plurality of identical fasteners of the aforementioned type, each of the fasteners being arranged in a parallel, side-by-side, spaced relationship. A connector post connects the first transverse bars of adjacent fasteners, and a connector post connects the second transverse bars of adjacent fasteners. An extra transverse bar is connected by a connector post to the first transverse bar of the last fastener, and another extra transverse bar is connected by a connector post to the second transverse bar of the last fastener, the extra transverse bars not being interconnected by a flexible filament.
摘要:
A unitary plastic fastener clip comprising a plurality of individual fasteners which are disposed in a substantially parallel, side-by-side, spaced relationship. Each fastener comprises an elongated flexible filament having a first enlarged end and a second enlarged end. In one embodiment, each of the first enlarged end and the second enlarged end is a substantially cylindrical transverse bar. In another embodiment, the first enlarged end is a transverse bar of non-uniform transverse cross-section and the second enlarged end is a generally knob-shaped head. A first connector post connects the first enlarged end of the first fastener to the first enlarged end of the second fastener at the approximate midpoints of their mutually-opposing sides. A second connector post connects the second enlarged end of the first fastener to the second enlarged end of the second fastener at the approximate midpoints of their mutually-opposing sides. The fastener clip further includes an elongated runner bar and a plurality of connective necks. Each connective neck is formed onto the runner bar and includes a first end of reduced cross-sectional area which is formed onto the first enlarged end of an associated fastener. The fastener clip is preferably constructed through a process of injection molding.
摘要:
A unitary, plastic clip of fasteners comprises a plurality of individual fasteners which are disposed in a substantially parallel, stacked, spaced relationship. Each fastener comprises an elongated flexible filament and a pair of transverse cross-bars which are disposed on opposite ends of the filament, the pair of transverse bars being disposed in perpendicular relation to the filament. The plurality of individual fasteners are maintained in its substantially parallel, stacked, spaced configuration by a plurality of thin, severable connector posts. One thin, severable connector post interconnects the approximate midpoint of the transverse bars of each pair of adjacent individual fasteners.
摘要:
A needle useful in the dispensing of plastic fasteners. In one embodiment, the needle includes a shank portion and a base portion, the shank portion having a front section shaped to define a spoon-shaped tip. The tip has a blunt point with a radius approximately twice that of conventional needles. The distance from the point to where the tip reaches full diameter is approximately 80% of the distance typically found in conventional needles, and the full diameter of the tip is less than that in conventional needles. The side profile of the top edges of the tip are flat or downwardly-curved as opposed to being upwardly-curved in conventional needles. The distance across the tip at its widest point between opposing top edges is less than that in conventional needles.
摘要:
A fastener attaching tool particularly suited for use in attaching buttons to clothing, etc. and which is constructed for use with a fastener clip which includes a pair of runner bars and one or more U-shaped fasteners having transverse bars at opposite ends, each transverse bar being connected on its side to a corresponding runner bar by a severable connector post. The tool includes a pair of needles each having a longitudinal slotted bore adapted to receive one of the transverse bars and a knife edge formed on one side which is adapted to sever a connector post from its associated transverse bar as the transverse bar is pushed through the needle. The body includes a transverse feed slot disposed just to the rear of the needles down through which the fastener clip is manually inserted. The tool also includes an ejector mechanism, which is slidably mounted back and forth within the body and is rearwardly biased by a spring. The ejector mechanism is manually operable from the rear of the body and includes a pair of ejector rods which are slidably back and forth within the bores of the needles and are used to push the transverse bars into and through the needles.
摘要:
A recursive noise reduction filter for video components reduces the noise bandwidth of a signal without degrading the signal spectrum. Demodulated chrominance or peak detected chrominance from a video signal output by a video system in reponse to a video test signal is input to the recursive noise reduction filter which acts as a comb filter to suppress noise significantly at frequencies other than harmonics of the horizontal line rate. The signal is scaled by a first attenuator having a scaling factor of (1-a), where (a) is less than one, and input to a summing circuit. Also input to the summing circuit is a delayed signal from a prior horizontal line scaled by the scaling factor (a). The output of the summing circuit is a filtered output signal. The signal is sampled only during horizontal lines that have the video test signal and is stored for subsequent accumulation with other horizontal lines also having the video test signal. The fitler serves to add the vertically correlated part of the signal corresponding to the video test signal while averaging out the noise, thus improving the overall signal to noise ratio without degrading the signal spectrum and, hence, enhancing differential gain and phase measurements.
摘要:
A device for dispensing a plastic fastener from a supply of ladder-type fastener stock includes a pair of separate modules that are independently pneumatically powered by a common air source. Each module is adapted to receive and index a corresponding side rail of the fastener stock, separate a cross-bar therefrom and eject the separated cross-bar out through a sharpened needle. As a feature of the invention, the pair of modules ejects the cross-bars of the dispensed fastener in an offset relationship to minimize fastener stress. As another feature of the invention, the pair of modules is independently slidably coupled to a common mounting plate. In this manner, the spacing and angular orientation between the modules are adjustable. As another feature of the invention, the feed mechanism includes a feed pawl that selectively engages outwardly facing notches formed in the side rail to ensure accurate alignment prior to the severing process.
摘要:
A device for dispensing an individual plastic fastener from a supply of fastener stock includes a motor-driven head assembly adapted to receive the supply of fastener stock, sever an individual fastener from the supply and in turn eject the severed fastener. The head assembly includes a pair of needle block assemblies that retain corresponding hollow needles, each needle block assembly being shaped to define a feed channel that transitions a side rail for the fastener stock into axial alignment behind its corresponding needle. In addition, at least one needle block assembly includes a rearward shelf and a forward bowing plate. In use, the lowermost cross-links of the fastener stock fittingly align between the shelf and the bowing plate. In this manner, the lowermost cross-links are limited to distort uniformly upward within the single plane defined by the pair of feed channels, thereby optimizing feed reliability of the device.