In At Least One Of Plural Abrading Steps Patents (Class 451/34)
  • Patent number: 10115848
    Abstract: A method of transferring a thin film includes: providing a first element structure, wherein the first element structure includes a first substrate and a functional film layer formed on the first substrate; completely removing the first substrate, wherein steps of the completely removing the first substrate includes: conducting an etching step to erode the first substrate, and conducting a grinding step to planarize the eroded first substrate; and after completely removing the first substrate, attaching the functional film layer on a second substrate to form a second element structure.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: October 30, 2018
    Assignee: NATIONAL TSING HUA UNIVERSITY
    Inventors: Yu-Lun Chueh, Kuan-Chun Tseng, Yu-Ting Yen
  • Patent number: 8662960
    Abstract: A method for polishing a vehicle wheel, the wheel includes a plurality of holes and a cylindrical rim. A polishing media storage tank holding abrasive media is vibrated to cause the medium to flow in an upwardly or downwardly vortex. The vehicle wheel is dipped into the medium such that the rim portion is disposed between the upward or downward flow of the medium, to polish the wheel.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: March 4, 2014
    Assignee: Ray's Engineering Co., Ltd
    Inventors: Shujiro Inatani, Tomoyuki Murakami
  • Patent number: 8535116
    Abstract: A magnetic particle carrying device includes a magnetic field generator and a hollow cylindrical structure. The magnetic field generator generates a magnetic field. The hollow cylindrical structure encases the magnetic field generator and attracts magnetic particles on an external surface of the hollow structure using the magnetic field. The external surface of the hollow cylindrical structure is provided with a plurality of elliptical depressions. The depressions include first type depressions and second type depressions. A long axis of a first type of elliptical depression is substantially extending in an axial direction of the hollow cylindrical structure, and a long axis of a second type of elliptical depression is substantially extending in a circumferential direction of the hollow cylindrical structure. The external surface of the hollow cylindrical structure has more elliptical depressions of the second type than elliptical depressions of the first type.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: September 17, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroya Abe, Tsuyoshi Imamura, Kyohta Koetsuka, Tadaaki Hattori, Yoshiyuki Takano, Noriyuki Kamiya, Masayuki Ohsawa, Mieko Terashima, Takashi Innami
  • Patent number: 8469075
    Abstract: A coating film peeling apparatus for resin material includes: a peeling cylinder, a peeling roll installed therein with a space for a peeling process along an inner wall of the peeling cylinder, a resistance lid disposed to block a discharge port of the peeling cylinder, and a pressure adjustment part for adjusting an outflow rate and internal pressure of the peeling cylinder. The peeling cylinder is constituted by a polygonal-shaped angular columnar body having, as coating film pass-through holes, rows K of small holes and rows L of small holes and projection rings (angular embossments) provided alternately in multiple rows along a direction perpendicular to a rotating direction of the peeling roll.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: June 25, 2013
    Assignee: Satake Corporation
    Inventors: Hidekazu Furukawa, Katsumi Okamoto
  • Patent number: 8062094
    Abstract: Pinion gears for planetary gear transmissions are hobbed, heat treated, and then ground to get better control of the leads/profiles on all the gear teeth. Then a light shot peening is applied to the tooth flanks to achieve the desired compressive residual stresses on the tooth surface. By applying the process in the controlled manner specified, the surface is not over-cold worked. Next, a chemically assisted isotropic surface treatment is applied over the pinion gears to improve the surface finish on the gear teeth. For low speed applications the surface finish improves the lambda ratio, allowing for a good oil film thickness on the surface of the gear teeth.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: November 22, 2011
    Assignee: Deere & Company
    Inventors: Roman Cisek, Jeffrey Brengle Finn
  • Patent number: 8016641
    Abstract: A method for manufacturing a golf club head having scorelines is disclosed herein. The method includes tumbling a raw cast golf club head in a tumbler containing a rough cut media. The tumbling occurs for at least six hours to create a tumbled golf cub head. The method also includes grinding the tumbled golf club head to clean a perimeter of the tumbled golf club head to create a ground golf club head. The method also includes polishing the ground golf club head to create a polished golf club head. The method also includes finishing the golf club head to create a finished golf club head.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: September 13, 2011
    Assignee: Callaway Golf Company
    Inventors: Brandon T. Vincent, Robert S. Gonczi
  • Publication number: 20100210183
    Abstract: A method for manufacturing a golf club head having scorelines is disclosed herein. The method includes tumbling a raw cast golf club head in a tumbler containing a rough cut media. The tumbling occurs for at least six hours to create a tumbled golf cub head. The method also includes grinding the tumbled golf club head to clean a perimeter of the tumbled golf club head to create a ground golf club head. The method also includes polishing the ground golf club head to create a polished golf club head.
    Type: Application
    Filed: February 18, 2009
    Publication date: August 19, 2010
    Applicant: CALLAWAY GOLF COMPANY
    Inventors: BRANDON T. VINCENT, ROBERT S. GONCZI
  • Patent number: 7560384
    Abstract: A chemical mechanical polishing method, including: chemically and mechanically polishing a polishing target surface by continuously performing a first polishing step and a second polishing step having a polishing rate lower than a polishing rate of the first polishing step, a chemical mechanical polishing aqueous dispersion used in the first polishing step and the second polishing step being a mixture of an aqueous dispersion and an aqueous solution, and the polishing rate being changed between the first polishing step and the second polishing step by changing a mixing ratio of the aqueous dispersion and the aqueous solution.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: July 14, 2009
    Assignee: JSR Corporation
    Inventors: Hirotaka Shida, Masayuki Hattori
  • Publication number: 20090017728
    Abstract: A method for producing graphite spheres from graphite fines by charging a quantity of spherical media into a rotatable cylindrical overcoater, charging a quantity of graphite fines into the overcoater thereby forming a first mixture of spherical media and graphite fines, rotating the overcoater at a speed such that the first mixture climbs the wall of the overcoater before rolling back down to the bottom thereby forming a second mixture of spherical media, graphite fines, and graphite spheres, removing the second mixture from the overcoater, sieving the second mixture to separate graphite spheres, charging the first mixture back into the overcoater, charging an additional quantity of graphite fines into the overcoater, adjusting processing parameters like overcoater dimensions, graphite fines charge, overcoater rotation speed, overcoater angle of rotation, and overcoater time of rotation, before repeating the steps until graphite fines are converted to graphite spheres.
    Type: Application
    Filed: July 11, 2007
    Publication date: January 15, 2009
    Applicant: UT-BATTELLE, LLC
    Inventors: Peter J. Pappano, Michael R. Rogers
  • Patent number: 7303691
    Abstract: A polishing method includes a slurry adjusting step for adjusting a polishing slurry containing silica particles so that the number of silica particles having a composition ratio of Si/O of 50–60 wt %/40–50 wt %, a modulus of elasticity of 1.4×1010 Pa or higher and a particle size of 1 ?m or larger is 3000 pcs/ml or less. A semiconductor wafer is polished using the polishing slurry adjusted in the slurry adjusting step.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: December 4, 2007
    Assignee: Sumco Techxiv Corporation
    Inventors: Kazuaki Kozasa, Motoharu Yamada, Yasuhiro Tomita, Hiromi Wakabayashi
  • Patent number: 7273409
    Abstract: A process is disclosed for forming a spherical component using a centrifugal processing machine. The process includes the steps of providing a component having an initial shape with at least a portion that is non-spherical, placing the component into a container in the centrifugal processor, adding a first stage abrasive media into the container, and rotating the container so as to produce centrifugal and rotational motion of the abrasive within the container. The motion of the abrasive causes the component shape to change from the initial shape to a substantially spherical shape through the repeated contacting of the component's surface by the abrasive. In one embodiment, the components are further processed in a second stage using a different media to polish the surface of the component.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: September 25, 2007
    Assignee: Mikronite Technologies Group, Inc.
    Inventor: Steve E. Hoffman
  • Patent number: 6875081
    Abstract: A method for forming a tool having a smooth surface finish is disclosed. The method involves the step of first rotating a plurality of tools within an inner vessel at high speed relative to the outer vessel with a first abrasive. The first abrasive is then removed and a second abrasive is added to the vessel. The inner vessel is then rotated, again at high speed, with the second abrasive. The resulting tools have reduced surface anomalies.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: April 5, 2005
    Assignee: Mikronite Technologies Group Inc.
    Inventor: Steve Hoffman
  • Patent number: 6833109
    Abstract: In an apparatus, after completion of a CMP (i.e., chemical mechanical polishing) operation of a semiconductor wafer, the thus polished wafer is temporarily stored in a water tank before it is subjected to a post-CMP cleaning operation. During its storage period in the water tank, the wafer is prevented from being chemically attacked by an oxidizing agent contained in an abrasive used in the CMP operation. The apparatus includes: the water tank for storing the wafer therein; a pure water supply pipe for supplying pure water to the water tank; an anticorrosion agent supply pipe for supplying an anticorrosion agent to the pure water; a drain pipe connected with a lower portion of the water tank to discharge the water from the water tank; a return pipe for returning the discharged water to an upper portion of the water tank through a pump and a filter, the return pipe branching-off from the drain pipe; and, valves mounted on these pipes.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: December 21, 2004
    Assignee: NEC Electronics Corporation
    Inventors: Hidemitsu Aoki, Shinya Yamasaki
  • Patent number: 6821359
    Abstract: A deburring method of removing burrs present on the surface of a yoke component, made from a low steel carbon steel, of a voice coil motor for a hard disk drive, includes a first step of subjecting the yoke component to a barrel polishing treatment; and a second step of subjecting the yoke component to at least one of an abrasive grain fluidization treatment, a thermal deburring treatment, a magnetic polishing treatment, an ultrasonic deburring treatment, and a water jet deburring treatment.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: November 23, 2004
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Ryo Osugi, Takashi Arikawa, Nobutaka Kobayashi
  • Patent number: 6808439
    Abstract: A process and apparatus wherein a bulk quantity of parts is positioned in a channel-like treating chamber which is subjected to vibration to cause the flowable mass of parts to slowly undergo a corkscrew-like tumbling movement. One or more nozzle arrangements are positioned adjacent the treating chamber so that each nozzle has its discharge orifice position closely adjacent the flowing bulk mass in the chamber to effect high-velocity blasting of a selected region of the flowing mass. The nozzle emits a high-velocity spray which is defined by a carrier medium such as air having small abrasive particles or grit embedded therein. The abrasive spray contacts a concentrated area which has relatively small transverse and longitudinal extent over the flowing mass in the chamber. Due to its high-velocity discharge, the spray is effective in penetrating at least partway into the depth of the flowing mass to abrade the parts.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: October 26, 2004
    Assignee: Roto-Finish Company, Inc.
    Inventor: Steven J. Carpenter
  • Publication number: 20040158323
    Abstract: A system and method of processing an item at least partially formed of a hydrophilic material to reduce or increase the item's protein affinity. In one example, the system and method prevent or greatly reduce the formation of insoluble ionic materials in or on the item during processing, thereby reducing its affinity for binding with pertinacious materials. An example application involves reducing the protein affinity of an ocular item such as an intra ocular lens or a contact lens, thereby reducing the potential for in-eye or on-eye ossification of the item.
    Type: Application
    Filed: November 18, 2003
    Publication date: August 12, 2004
    Inventors: James R. Lisk, Phillip V. Robledo, Thomas R Paul
  • Publication number: 20030186626
    Abstract: A process and apparatus wherein a bulk quantity of parts is positioned in a channel-like treating chamber which is subjected to vibration to cause the flowable mass of parts to slowly undergo a corkscrew-like tumbling movement. One or more nozzle arrangements are positioned adjacent the treating chamber so that each nozzle has its discharge orifice position closely adjacent the flowing bulk mass in the chamber to effect high-velocity blasting of a selected region of the flowing mass. The nozzle emits a high-velocity spray which is defined by a carrier medium such as air having small abrasive particles or grit embedded therein. The abrasive spray contacts a concentrated area which has relatively small transverse and longitudinal extent over the flowing mass in the chamber. Due to its high-velocity discharge, the spray is effective in penetrating at least partway into the depth of the flowing mass to abrade the parts.
    Type: Application
    Filed: November 9, 2001
    Publication date: October 2, 2003
    Inventor: Steven J. Carpenter
  • Publication number: 20020077033
    Abstract: Residual fine foreign matters are infallibly removed when manufacturing bearing parts. A removal process of residual fine foreign matters is taken before a high precision water-washing process in a manufacturing process of each component of a rolling bearing. Accordingly, residual fine foreign matters generated in a cutting process, a heat-treating process and a grinding process are removed, including metal powder like a metal chip and falling pieces of bearing components. In the removal process of residual fine foreign matters, ground pieces of corn-cob as a raw material are used for a grinding medium. Thus, damages to a surface of rolling bearing parts may be minimized during the removal process. Moreover, the medium is likely to accommodate to a surface of bearing parts, so that residual fine foreign matters may be effectively removed.
    Type: Application
    Filed: November 15, 2001
    Publication date: June 20, 2002
    Applicant: MINEBEA CO., LTD.
    Inventors: Hiroyuki Yajima, Shigenori Hoya
  • Publication number: 20020077032
    Abstract: A method for polishing and chamfering a rare earth alloy including the steps of: preparing rare earth alloy work, feeding the rare earth alloy work, ball media, a liquid medium, and spacer particles (in an amount of 0.1% to 10% by volume of the liquid medium) into a container, and subjecting the rare earth work to polishing by vibrating the container.
    Type: Application
    Filed: June 22, 2001
    Publication date: June 20, 2002
    Inventors: Sadahiko Kondo, Toshiaki Sasaki, Toshifumi Hiyoke
  • Patent number: 6367134
    Abstract: A ceramic electronic part producing method, in which when a ceramic electronic part having an internal electrode in a ceramic sintered body and having an external electrode connected to the internal electrode at an outside surface thereof is to be produced, a ceramic sintered body is obtained, and then subjected to dry-type barrel polishing, which does not use water, using a centrifugal barrel device in order to expose the internal electrode from an outside surface of the ceramic sintered body. The method is one in which the problem of deterioration of electrical properties, such as insulation resistance property, caused by entrance of moisture during polishing, seldom occurs and in which a large number of highly reliable ceramic electronic parts can be produced.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: April 9, 2002
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yukio Sanada, Shinichiro Kuroiwa, Kyoumi Tsukida, Masayuki Taniguchi
  • Patent number: 6280294
    Abstract: There are disclosed a polishing method and a polishing device in which cleaning of a glass substrate surface can be achieved to a high level. A glass substrate (MD substrate 1) in the shape of a circular disc having a circular hole in a center portion is immersed in an abrasive liquid 50 containing free abrasive grains, and an inner peripheral end surface of the glass substrate is polished using the abrasive liquid containing the free abrasive grains by rotating a rotary brush 4 or a polishing pad in contact with the inner peripheral end surface.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: August 28, 2001
    Assignee: Hoya Corporation
    Inventor: Takemi Miyamoto
  • Publication number: 20010003696
    Abstract: A wet type buffing method is practiced such that a final buffing step is conducted in a buffing liquid having alkality and the remaining buffing steps are conducted in other buffing liquid having acidity. A work buffing apparatus is constructed such that a disconnection preventive member is disposed at the foremost end of a shaft for a work, the outside of a buffing wheel comes in contact with the disconnection preventive member, a tightening nut is threadably engaged with the buffing wheel, and the buffing wheel is tightly fixed to the shaft by displacing the tightening nut along the shaft. In addition, a surface treatment conducting method is practiced such that each surface treatment is conducted after a work is subjected to barrel buffing before or after the surface treatment. Additionally, a work supporting apparatus includes a buffing medium receiving container having a buffing medium received therein and a work supporting arm.
    Type: Application
    Filed: September 15, 1997
    Publication date: June 14, 2001
    Applicant: BBF YAMATE CORPORATION
    Inventors: SHUJI KAWASAKI, AKITAKA MATSUSHITA
  • Patent number: 6241588
    Abstract: A chemical mechanical polishing system comprising a moving polishing pad and an ultrasonic conditioning head. The head is positioned in close facing relationship to the pad surface and agitates a liquid on the rotating pad surface at an appropriate frequency and sufficient amplitude to produce cavitation of the slurry in the vicinity of the pad surface. The action of cavitational collapse vigorously conditions the pad, driving out contaminants and re-texturizing the pad.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: June 5, 2001
    Assignee: Applied Materials, Inc.
    Inventors: Kyle A. Brown, Boris Fishkin
  • Patent number: 6186868
    Abstract: A method of polishing articles comprising soft acrylic materials is disclosed. The method includes a polishing step and a cleaning step. In the polishing step a receptacle is charged with polishing beads of various sizes, alumina, sodium hydroxide, water, a surfactant, and the articles to be polished, and agitated for a period of time and at a speed sufficient to remove surface irregularities. The polishing step is completed below the glass transition (Tg) point of the acrylic article being polished but above 0° C. Following the polishing step, the polished articles are cleaned by rinsing them with water for a period of time to clean the surface of the polished articles.
    Type: Grant
    Filed: December 2, 1999
    Date of Patent: February 13, 2001
    Assignee: Alcon Laboratories, Inc.
    Inventors: Bryan L. Cremeans, Teresa L. Pickett, Jennia Tucker
  • Patent number: 6099389
    Abstract: A method for forming optical parts used in laser optical systems such as high energy lasers, high average power lasers, semiconductor capital equipment and medical devices. The optical parts will not damage during the operation of high power lasers in the ultra-violet light range. A blank is first ground using a fixed abrasive grinding method to remove the subsurface damage formed during the fabrication of the blank. The next step grinds and polishes the edges and forms bevels to reduce the amount of fused-glass contaminants in the subsequent steps. A loose abrasive grind removes the subsurface damage formed during the fixed abrasive or "blanchard" removal process. After repolishing the bevels and performing an optional fluoride etch, the surface of the blank is polished using a zirconia slurry. Any subsurface damage formed during the loose abrasive grind will be removed during this zirconia polish. A post polish etch may be performed to remove any redeposited contaminants.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: August 8, 2000
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Michael A. Nichols, David M. Aikens, David W. Camp, Ian M. Thomas, Craig Kiikka, Lynn M. Sheehan, Mark R. Kozlowski
  • Patent number: 6095901
    Abstract: A method for polishing articles comprising soft acrylic materials is disclosed. The method includes a polishing step and a cleaning step. In the polishing step, a receptacle is charged with polishing beads of various sizes, alumina, a swelling agent and the articles to be polished, and agitated for a period of time and at a speed sufficient to remove surface irregularities. Following the polishing step, the polished articles are cleaned by agitating them with a cleaning slurry comprising cleaning beads of various sizes, alumina, a solvent and a surfactant for a period of time and at a speed sufficient to clean the surface of the polished articles. Agitation is preferably accomplished by a tumbling machine.
    Type: Grant
    Filed: December 9, 1998
    Date of Patent: August 1, 2000
    Assignee: Alcon Laboratories, Inc.
    Inventors: Stephanie Robinson, Kevin Lewellen
  • Patent number: 6074284
    Abstract: An abrasive super-finishing method for workpieces, such as metallic thin-film magnetic discs, employs a polishing/texturing material having a backing, such as synthetic resin film or woven material or non-woven cloth, and a layer which can hold abrasive grains on the backing, such as flocked fibre or a porous polymer foam, on one surface of the backing. An electrolytic solution in which abrasive grains are suspended is supplied to the polishing/texturing material to conduct polishing or texturing of the workpiece surfaces. The workpiece is connected to an anode and a pressure roller or a cathode bar is connected to a cathode. A voltage is applied between the workpiece and the pressure roller or cathode bar to conduct simultaneously electrolytic polishing and abrasive polishing/texturing.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: June 13, 2000
    Assignee: Unique Technology International PTE. Ltd.
    Inventors: Kazunori Tani, Kohichi Kawachi
  • Patent number: 5873770
    Abstract: A workpiece has at least one exterior surface with an initial average surface roughness (Ir). The profile of the exterior surface is derived by conventional manufacturing processes, some of which leave the exterior surface with irregularities having directional orientation. The workpiece is subjected to a controlled vibratory finishing process such that the exterior surface has a desired average surface roughness (Ar) after exposure to the finishing process for a predetermine period of time (T.sub.opt). This predetermined period of time is based upon the initial average surface roughness (Ir), the desired average surface roughness (Ar) and a minimum average surface roughness obtainable through the vibratory finishing process (Dr).
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: February 23, 1999
    Assignee: The Timken Company
    Inventor: Fukuo Hashimoto
  • Patent number: 5716259
    Abstract: System and method for locating and polishing a stain or protrusion on a surface of a vehicle. The stain or protrusion may be located by placing a plastic film between a portion of a human hand and the surface. The stain or protrusion may then be removed and/or polished by applying a plastic flexible tool to it.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: February 10, 1998
    Inventor: Paul David Miller
  • Patent number: 5690538
    Abstract: A new Method of Shaping and Polishing Jewelry from Shells for making jewelry from shells thereby providing an aesthetically pleasing piece of jewelry. The inventive device includes grinding a shell approximately into a desired shape, tumbling the shell in a coarse grade material, then tumbling in a semi-coarse grade material, then tumbling in a fine grade polishing material, and thereafter securing to an article of jewelry. This method makes assorted types of jewelry such as necklaces, pendants, bracelets and earrings.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: November 25, 1997
    Inventor: Eugene A. Haas
  • Patent number: 5643054
    Abstract: A machine part includes a surface suitable for rolling contact and/or sliding contact on another machine pad and made by an at least two-stage honing process, with a first honing step effecting a surface texture exhibiting a plurality of peaks and a plurality of pits and defining a mean profile line, and a second honing step for removal of the peaks to a level of the mean profile line for forming a plateau-like tenure that is interrupted by crossing pits, whereby the depth of the pits from the first honing step is maintained. Subsequently, abrasive grain is pushed into the surface for creating a crater-like recess, thereby displacing material at random in horizontal and venial directions for at least partially closing the pits. Mounds created during material displacement and positioned above the mean profile line are removed through a subsequent polishing process.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: July 1, 1997
    Assignee: INA Walzlager Schaeffler KG
    Inventors: Peter Bach, Ludwig Kern, Ernst Strian
  • Patent number: 5507685
    Abstract: A method for finishing a surface of a workpiece, having the steps of agitating the workpiece with a first mixture including a first plurality of discrete, homogeneous compressed felt chunks having a first particulate abrasive coating thereon, and then agitating the workpiece with a second mixture including a second plurality of discrete, homogeneous compressed felt chunks having a second particulate abrasive coating thereon with an abrasive size smaller than an abrasive size of the first particulate abrasive coating.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: April 16, 1996
    Inventor: Steve E. Hoffman
  • Patent number: 5365701
    Abstract: A tool for forming a soft contact lens having an optical zone formed with a center spherical surface and surrounding aspheric surfaces is disclosed. The tool includes a lens holder having a perfectly centered rearwardly extending cylindrical portion received in a collet of a lens cutting lathe and a transverse front end wall defining a front end opening receiving the lens blank body projecting forwardly through the opening. The lens blank is formed with a mounting flange seated against a rear facing step in the transverse end wall. The lens body is retained in the holder with an insert threadedly received in the holder. A set screw received in the insert applies pressure to the lens blank rear surface to deform the front concave surface which has been previously cut and polished to a spherical surface.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: November 22, 1994
    Assignee: Contact Lens Corporation of America
    Inventor: Howard J. Brown