Abstract: The present disclosure provides a roller for cleaning a backside of a wafer. The backside of the wafer has a central region and a periphery region surrounding the central region. The roller includes an upper element, a bottom element, and an axis element for connecting the upper element and the bottom element. The upper element of the roller is configured to contact with a frontside of the wafer. The bottom element is configured to contact with the backside of the wafer and remove particles from the periphery region of the backside of the wafer. The bottom element is made of materials selected from a group comprising abrasive pads, sand papers, and asbestos.

Abstract: Disclosed is a grinding tool (1) for highly accurate centre-less grinding in continuous process for shaft-like workpieces (16), comprising at least one conical (3) and one cylindrical grinding region (4). With its first grinding cover (13), the conical grinding region (3) is primarily intended for grinding larger cutting volumes, whereas the cylindrical grinding region (4), with its second grinding cover (14) is primarily intended for achieving the highest surface quality, without, in the case of the latter, having to remove large cutting volumes. The grinding covers (13, 14) differ at least in respect of the grinding agent used, CBN preferably being used in the conical region and diamond being used in the cylindrical region. Further disclosed is a method, which works with the grinding tool (1) as per the invention and which grinds the shaft-like workpieces (16). Oversize and surface quality are at least temporarily simultaneously ground.

Abstract: In a machine for centerless cylindrical grinding, the workpiece is located in a grinding gap, which is formed by the regulating wheel, the grinding wheel and the support blade. The regulating wheel rotates about its axis of rotation with the direction of rotation, and thereby drives the workpiece to rotate in the direction of rotation. The grinding wheel is driven to rotate about its axis of rotation with the direction of rotation. The workpiece passes in the direction of its longitudinal axis through a number of sets of regulating wheels and grinding wheels, which are each themselves arranged coaxially one behind the other. The regulating wheels and grinding wheels have axial interspaces on their axes; the regulating wheels thereby engage in the interspaces between the grinding wheels, and vice versa, so as to form lateral regions of overlap between the wheels.

Abstract: A form tap includes a shank having a shank length and a thread portion that extends along at least a portion of the shank length. The thread portion includes a finishing portion and a chamfer portion. Each of the finishing portion and the chamfer portion include a plurality of threads and each thread has a crest and a root. The plurality of threads of both the finishing portion and the chamfer portion are spaced apart at a constant pitch, such that a crest-to-crest distance between adjacent threads remains constant along the entire thread portion.

Abstract: A centerless feed-through super-finishing device including: first and second feed-through rollers having first and second longitudinal outer surfaces; a metallic part having a generally cylindrical section, disposed between the outer surfaces, wherein a longitudinal axis of the cylindrical section is generally aligned with the outer surfaces, the cylindrical section having a metal working surface, the outer surfaces disposed in a near-parallel fashion; a rotating mechanism for rotation of the rollers along respective longitudinal axes thereof, and for effecting thereby a rotation of the cylindrical section, wherein an angle between the rollers is selected such that rotation of the rollers propels the cylindrical section between the rollers; and a lapping system including: a lapping tool having a polymeric contact surface disposed to contact the working surface, and a lapping mechanism, associated with the lapping tool, adapted to exert a load on the contact and working surfaces; and abrasive particles, freely

Abstract: An apparatus for cleaning edges of substrates is described. The present invention provides a cleaning mechanism that cleans particles off the edge of the wafer based on friction and/or a difference in tangential velocity at a point of contact between the wafer and the cleaning mechanism.

Abstract: For conveying in single file and in a lying position substantially cylindrical objects such as nuclear fuel pellets (P) in a substantially horizontal, non-linear path, a conveying system (20) is proposed, which comprises an endless belt (26) running over pulleys having substantially vertical axes. Regulatable guides (44) maintain the objects laterally on the upper edge (30) of the endless belt (26).

Abstract: A loading apparatus (14) loads a workpiece (16) into a through-feed mechanism (20, 22, 24) which advances the workpiece (16) through a processing device (12) at an advancement speed. The loading apparatus (14) includes a roller assembly (30, 32) which grips the workpiece (16), and further includes a motorized drive train (34) which drives the roller assembly (30, 32) to urge the workpiece (16) toward the through-feed mechanism (20, 22, 24) at a speed greater than the advancement speed. The drive train (34) includes a slip clutch (86) which permits slippage in the drive train (34) under resistance transmitted through the workpiece (16) from the through-feed mechanism (20, 22, 24) to the roller assembly (30, 32). The roller assembly (30, 32) loads the workpiece (16) against the resistance of the through-feed mechanism (20, 22, 24) at a speed not greater than the advancement speed.

Abstract: A dry abrasive delabeling apparatus for both plastic and glass bottles, sometimes called a label stripper, in which the bottles are fed by an in-feed starwheel to a circular starwheel which rotates the bottles slowly. Within the starwheel are wire bristle brushes rotating at a high speed against the bottles to flick off paper, foil, or plastic from the label on the bottle while restraining the bottle in close contact to the ends of the wire bristle by means of a rubber bladder to press against the bottles. The bottles are held against the wire bristles while the bottles are rotated as they are held against the bladder. The debris is vacuumed away from the apparatus.

Abstract: The part (1) to be machined, which exhibits an axis of revolution (aa') is secured in a rotatable spindle (11) forming part of a headstock (10) movable in translation on the framework of the grinding machine according to a longitudinal axis (X) parallel to the axis of revolution (aa'). A support (16) fixed to the framework and in the immediate proximity of which is arranged a grindstone (18), serves as lateral support to a portion of the part (1) to be machined. Grinding of the part (1) by the grindstone (18) over an arbitrary length capable of exceeding 1000 times its diameter, is effected by displacing the headstock (10) by such length in the sense of the longitudinal axis (X).

Abstract: A surface finishing apparatus for in-line outer surface finishing of elongate cylindrical stock. The stock, such as tubing, is fed through the finishing apparatus from an infeed to an outfeed position and rotated about its longitudinal axis. The outer surface of the stock is finish treated as the stock is fed through the apparatus. The finishing apparatus includes a rotatable finishing wheel having a finish-treating peripheral surface for being applied in an in-line orientation against the outer surface of the stock as the stock is simultaneously fed and rotated through the finishing apparatus. The wheel is mounted on an axis of rotation which is variable within a predetermined range of motion from one side to the other of the longitudinal axis of the stock. The finishing wheel is oscillated back and forth within the predetermined range of motion while in continuous contact with the stock.

Abstract: A gage for a thrufeed centerless grinder for post process gaging of a work piece in which the gage is mounted for movement so as to track along a moving work piece as it is moved along a path of travel from the grinder. The gage is movable in two directions mutually orthogonal to the path of travel of the work piece as it exits the grinder so as to track along the cross-section of the moving work piece enabling the gage to measure the work piece diameter. Movement of the gage is provided for by rotation about two axes wherein the gage motion is an arcuate direction having substantial vector components in the mutual orthogonal directions to the work piece path of travel.

Abstract: The novel ferrule grinding machine of the present invention has a wire support assembly having a wire that stretches the length of the wire support on which ferrules are strung. The wire rests in a novel guide that aids in producing ferrules within tolerances. The machine also has a grinding wheel and regulating wheel whose speed and composition may be changed to determine the surface finish and concentricity of a ferrule. The regulating wheel infeed assembly controls the size of the ferrules via a computer and a step motor that control the position of the regulating wheel as it tilts on a pivot base to attain the correct size of ferrule. The wire support assembly is placed on a variable speed work traverse that carries the work between the grinding wheel and regulating wheel, while the ferrules are supported on a rest blade such that the ferrules are worked slightly above their center.

Abstract: A method and apparatus for initially taking an individual bar from a supply of bars and placing it on an entry conveyor while preventing movement of the remaining bars. Other mechanisms are provided for adjusting the entry conveyor to accommodate the diameter of the bars to be ground. The individual bars to be ground are initially moved into position between a regulating wheel and a grinding wheel. The regulating wheel maintains the bar against the grinding wheel and the movement of the regulating wheel toward the grinding wheel during the grinding action is sensed by an encoder device. The encoder device in turn signals to a servomotor to move the grinding wheel an amount equal to but in the opposite direction to the regulating wheel to compensate for the wearing of the grinding wheel. The regulating wheel is set at a slight angle relative to the bar to impose a vector force that moves the bar through the grinding station to the exit conveyor from where the bar is subsequently moved to a holding area.

Abstract: An apparatus for grinding tapered points on needles is disclosed. The apparatus has a frame and a transport associated with the frame for transporting a plurality of needles. The transport has a predetermined curvature and a feeder is mounted adjacent the frame for feeding needles to the transport. A grinding wheel is disposed adjacent the transport and has a major diameter at a first end and a minor diameter at a second end, the major diameter being greater than the minor diameter and connected by a curved grinding surface the diameter of which increases progressively therebetween. The curvature of the grinding wheel in a first third portion between the major and minor diameters is of greater mean curvature than the mean curvature of the corresponding opposed portion of the transport. A second third portion of the grinding wheel is of greater mean curvature than the mean curvature of the corresponding opposed portion of the transport.

Abstract: Point-grinding apparatus comprising frame means, workpiece transport means operably mounted on the frame means for transporting a plurality of elongated workpieces therealong, workpiece support means disposed adjacent the transport means for supporting the elongated workpieces in contact with the transport means and grinding means including an asymmetrical concave grinding surface disposed adjacent the transport means to engage workpieces supported by the workpiece supporting means, the asymmetrical concave grinding surface being configured and dimensioned such that a surface area of each workpiece which contacts the grinding surface varies relative to the position of the workpiece with respect to the grinding surface. A method for grinding needle points is also provided including the steps of, providing a rotating grinding wheel having an asymmetrical concave grinding surface and feeding at least one workpiece to a first position such that each at least one workpiece is advanced along the grinding surface.