Abstract: An imprinter includes a printing base for mounting a card and a print paper to be imprinted on a predetermined area thereof, a carriage that is movable above the printing base, a roller includes a hard material and is provided as is housed within the carriage for transcribing the information represented as embossed on a card, a roller shaft for fixedly supporting the roller, bearings for rotatably supporting the roller shaft at a position of a predetermined height from the card mounting surface of the printing base, and an elastic mechanism provided between the bearings and the roller shaft, the elastic mechanism being radially deformed during an imprinting operation to cause the roller to radially move relative to the bearings so that the embossed information of the card may be transcribed onto the print paper.

Abstract: A line printer with a hammerbank having print hammers with printing tips and a ribbon supported for impact by the tips for printing on media and a metal platen for supporting the media. An elastomer on the metal platen supports the media and has a layer of material harder than the elastomer extending inwardly from its surface which receives the impacts of the hammer tips. The harder material can be particles extending inwardly randomly from the surface of the elastomer of a ceramic having a sphericity exceeding 0.50 up to 35 percent of the thickness of the elastomer, and in the range of 20 microns to 400 microns in size.

Abstract: A platen for an impact printer includes a hollow metal pipe having a hollow interior and inner and outer surfaces. A layer of elastic material covers the outer surface. A metal rod is inserted into the hollow interior and has an outer surface spaced from the inner surface to define therebetween a clearance. Such clearance is filled with a liquid.

Abstract: A dot impact type serial printer is provided with a print head which has a plurality of print wires for printing an image. The print wires required to print a particular image are thrust toward a platen successively upon receiving a print timing signal, where each print timing signal is delayed from the previous print timing signal by a predetermined time interval t. The delay of each print timing signal is based on the time required for a surface wave, caused by the impact of print wires on the platen, to pass lengthwise across the platen and is selected to be less than one-half the surface wave travel time.

Abstract: A platen knob includes a first hollow cylinder having one bottom wall, a second hollow cylinder extending from the interior surface of the bottom wall coaxially with the first cylinder. The second cylinder is fitted on a shaft of a cylindrical platen through a hollow boss of a casing housing the platen. A cavity defined between the sidewalls of the cylinders receives a vibration-proof lining and/or an acoustical layer. The lining suppresses a vibration of the platen knob. The acoustical layer seals the boss of the casing and leaks no noise from the interior of an electronic apparatus including a platen.

Abstract: The printer with a substrate support (1) is furnished with a layer structure in a print support cross-section (11). The layer structure comprises a metallic print bar (13), a vibration-attenuating damping layer (14), and a metallic intermediate layer (15) disposed sequentially in print element operation direction (12), where the intermediate layer (15) acts only functionally as "intermediate layer." In order to avoid a space-requiring and bulky layer structure of an insulating layer (16), neutralizing the frequencies of contacting components, the frequency-neutralizing insulating layer (16) is formed by elastic caps (18) at the ends (17a, 17b) of a unit, where the unit is formed by print bar (13), damping and absorbing layer (14), and intermediate layer (15). The elastic caps (18) can be slid into the recesses (19) of the printer side walls (20).

Abstract: A striker bar assembly includes a striker bar body having a recess at each of its opposite ends opening through top, bottom and end wall surfaces. The striker bar body has a flat impact surface perpendicular to the top and bottom surfaces. Generally T-shaped end members have legs for disposition in the striker body recesses. The wall surfaces of the striker body and legs of the members are spaced to provide a gap into which dampening material is provided. The gaps at each end of the striker bar assembly are of identical width in a front-to-back direction.

Abstract: A platen roll core has a plurality of roll elements, and spacers interposed between adjacent roll elements of attenuation of propagated vibrations. The core, seen in terms of vibrating system, is equivalent to the sum of vibrating systems independent of one another and corresponding to the respective roll elements. The axial length of each roll element is set to such a value that the natural frequency thereof in an axial flexural oscillation mode is greater than a frequency of vibration applied from a vibration source, to thereby avoid the resonance of the core in the axial flexural oscillation made with the vibration source, such resonance being a main cause of an increase in noise level.

Abstract: A method of producing platens for typewriters and similar office equipment. Conventional platens often include a large number of individual parts and are relatively expensive because of their high assembly and finishing costs. According to the invention, an impact-resistant polyolefin with the addition of a delayed-reacting foaming agent is employed in an injection molding process in such a fashion that, by means of differential cooling of the mold, the material on the platen surface and in areas of other functional elements such as line-advance wheel/notched wheel combinations hardens, while the core of the platen remains a foam. The process allows platens with other functional elements molded to them to be manufactured from a single material in a single operation and without any additional work, despite different demands made on the print backing and the other functional elements.

Abstract: A platen roller includes a core member and a rubber member which covers the circumferential surface of the core member. The rubber member is arranged to have a hardness value of 95.+-.3, JIS A, at 20.degree. to 25.degree. C. on the basis of JIS K6301-5.2 and a rebound resilience value of 4 to 7% at 20.degree. to 30.degree. on the basis of JIS K6301-11.

Abstract: A platen roller comprises a solid cylindrical base body which has rotating shafts secured to both ends thereof and a hard elastic layer which is applied to the outer circumference of the solid cylindrical base body. The ratio of diameter of the solid cylindrical base body to the outside diameter of the finished platen roller including the solid cylindrical base body and the hard elastic layer is arranged to be within a range from 45 to 75%.

Abstract: There is provided a platen roll low in generation of noise with keeping superior printability which comprises a shaft and a single layer of rubber composition concentrically and tightly applied around said shaft or two layers of an inner layer of a resin concentrically and tightly applied around said shaft and an outer layer of a rubber composition concentrically and tightly applied around said inner layer.

Abstract: A platen roll core member including an axle part, an external tube part coaxially disposed around the axle part and webs extending therebetween having a plurality of projections formed by at least one surface extending rectilinearly in the axial direction and integrally formed on either the outer surface of the axle part, on the inner surface of the external tube part or on both the outer surface of the axle part and the inner surface of the external tube part. Striking sounds generated as the platen roll core member is struck from outside make irregular reflections within a cavity of the core member due to the plurality of projections which results in quieter operation of the platen roll.

Abstract: Elastic bearings supporting bearing bushings for shafts are mounted in recesses in plates of a machine frame. The elastic material is shaped so that, in at least one predetermined direction transverse to the longitudinal axis of the shaft, its dimension is a multiple of that in other directions. What is achieved thereby is that the shaft is constrained to move in one defined direction only.

Abstract: A noise-reducing platen comprising a circular cylinder, a hub disposed along the longitudinal axis of and within the cylinder, and walls for dividing the annular region between the cylinder and the hub into a plurality of separated longitudinal channels extending the length of the cylinder. The walls include a plurality of vanes disposed at angular intervals about the hub, each vane extending (a) from the hub to the inner surface of the cylinder and (b) along the length of the cylinder, each pair of adjacent vanes defining one of the longitudinal channels. It is believed that the vibrations generated along the longitudinal channels are at a frequency above the audible range, thereby resulting in reduced undesired noise when printing elements strike the platen.

Abstract: The impact beam of a mechanical printer is constructed for noise dampening and yet exhibits a high resistance to wear. The beam unit comprises a block of dampening material which is held along a carrier support wall. A strip of metal is arranged along an exterior, generally flat surface of the block so as to be completely separated from adjacent surfaces of the support wall by a region of block material. The metal strip is arranged to receive the impact of type bars and other noise-inducing mechanical force elements of the printer. The noise emanating from such impacts are dampened as they travel through the block material. There is no direct connection between the metal strip and the housing of the mechanical printer in order to prevent direct transmission of noise vibrations from the strip to the housing.

Abstract: An acoustical noise attenuating platen for an impact printer including lead material fastened with a thermoplastic compound to the rear surface of a non-rotatable bar.

Abstract: A noise-reducing hollow platen having a hard external tube filled with steel or lead spheres.

Abstract: An impact receiving structure for an impact type printing mechanism, in which vibration members for guiding along branched paths the vibration of an impact receiving face member, which is vibrated by the striking energy of a printing hammer, are provided at other positions than the printing face of a platen or at the inside of a type drum in the impact type printing mechanism, and in which elastic vibration absorbing materials are packed in close contact with the vibration members, so that noise attendant with the printing hammer impact can be effectively attenuated.

Abstract: An apparatus for damping the acoustical impact noise traveling along a length of paper as it passes through a printer including resilient urethane foam rollers in engagement with a large proportion of the width of the paper with a pressure damping roller depressing portions of the paper deeply into engagement with the resilient roller to enable the resilient roller to damp acoustical energy traveling along the length of the paper.