Búsqueda Imágenes Maps Play YouTube Noticias Gmail Drive Más »
Iniciar sesión
Usuarios de lectores de pantalla: deben hacer clic en este enlace para utilizar el modo de accesibilidad. Este modo tiene las mismas funciones esenciales pero funciona mejor con el lector.

Patentes

  1. Búsqueda avanzada de patentes
Número de publicaciónUS3794314 A
Tipo de publicaciónConcesión
Fecha de publicación26 Feb 1974
Fecha de presentación13 Ene 1972
Fecha de prioridad13 Ene 1972
Número de publicaciónUS 3794314 A, US 3794314A, US-A-3794314, US3794314 A, US3794314A
InventoresCoburn O, Stith J
Cesionario originalCoburn Optical Ind
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Vacuum chuck for ophthalmic lens finishing machinery
US 3794314 A
Resumen
A vacuum chucking system for securing and holding an ophthalmic lens blank without the requirement of forming a block to a surface thereof.
Imágenes(1)
Previous page
Next page
Reclamaciones  disponible en
Descripción  (El texto procesado por OCR puede contener errores)

United States Patent 1 1 v .1 1 3,794,314

, [73] Assignee: Coburn Optical Industries, Inc.,

Coburn et a1. 1 Feb. 26, 1974 [5 1 VACUUM CHUCK FOR OPHTHALMIC 1,503,390 7/1924 Tenney 269/21 x S FINISHING MACHINERY 2,688,220 9/1954 Boutell 51/235 3,015,196 1/1962 Campbell 51/284 [75] Inventors: Orin W. Coburn; Joe D. Stith, both 3,461,622 8/1969 Rayford 51 235 X ofMuskogee, Okla. 2,545,448 4/1951 Clement 51/284 X F APPLl Muskogee, Okla QREIGN PATENTS 0R CATIONS 1,014,564 6/1952 France 279/3 22 I Filed: Jan. 13, 1972 v 1 1211 Appl. No: 217,469 Primary Examiner James L. Jones, Jr. Assistant'Examiner-J. T; Zatarga 52 us. c1. ..,.....'269/21, 51/216 LP, 51/217 L, AmmeY, Byme 51/235, 51 /284, 279/3 51 1m.c1 B25b 11/00 [58] Field 0fSearch..269/2l; 51/235, 216 LP, 217 L, 1 1 RA A vacuum chucking system for securing and holding an ophthalmic lens blank without the requir er'nent of, 1 5 ,Reterenc-esvclted I forming a block to a surface thereof.

' UNITED STATES PATENTS 904,679 11/1908 Bruto'n 279/3 1 Claim, 8 Drawing Figures I I I I 1 1 Y 5 I y 44 r 42 34 VACUUM CHUCK FOR OPI-ITHALMICLENS FINISHING MACHINERY of pitch or the like. Another common method is forming a metallic block of a low-melting point alloy. In each of these methods, of course, the lens blank must be oriented with respect to the'block and after finishing 7 common lens blocking techniques of the prior art. In

the block must be removed and the lens cleaned. The

pitch or alloy must be recovered for economic reasons.

A principal objective of this invention is to overcome the disadvantages of the prior-art blocking methods by securing the lens to a block by way of a vacuum. The block itself is provided with means for orienting the lens therewith and is equipped with all other features common to and considered necessary for a lens block.

Another important objective of this invention is to provide a vacuum system for securing lens blanks which is readily used with fining, polishing, beveling and generating equipment now on the marketplace.

Another important objective of this invention is to provide a lens block having a flexible opening-adapted to receive one surface of a lens blank wherein this surface becomes a wall of a vacuum-cavity which is used to secure the lens to the block.

A still further objective of this invention is to provide a lens blocking system in which a lens block is provided having hardened steel inserts for lens equipment drive pins and vacuum drawn via flexible tubing so that the apparatus for the vacuum source will not hamper or otherwise interfere with the movement necessary to lens fining, polishing, and surface generation.

Another objective of this invention'is to provide a blocking system which does not require separate blocking equipment or the requirement for melting pitch or alloy.

A still further objective of the invention is to provide a blocking system which utilizes a vacuum source of a type which is oftentimes already available in a lens finishing laboratory.

These and other objects of the invention will become more apparent to those skilled in the art by reference to the following detailed description when viewed in light of the accompanying drawings wherein:

FIG. 1 is an elevation view partially in section of a prior art block;

FIG. 2 is a bottom plan view of the unit as shown in FIG. 1;

FIG. 3 is a plan view of a first embodiment of this in- 4 vention;

this method, a lens L is secured to a block 10 by way of an adhesive 12. The member 10 can be steel or a formed-in-place metallic or plastic block. The block is circular for ready reception in chucking equipment. One of the surfaces is formed with detents or depressions l6 and 18 and oftentimes with a center detent 20. These detents oftentimes receive steel-hardened inserts to increase the longevity of the block.

A first embodiment of a block of this invention is shown in FIGS. 3 through 7. The blank will again be indicated by the letter L. As shown in FIGS. 3 and 4, a steel block 30 is provided having a circular boss or orienting protrusion 32 along one surface thereof. Its exterior cylindrical surface is indicated by the numeral 33. The other surface of the block is formed with a dishshaped depression 34 which is circumscribed by a rim 36. As shown in FIG. 3 the rim 36, immediately below its top edge 38, is formed with an inwardly tapered edge 40.which receives the lens blank L. The tapered edge 40 provides a shoulder for the lens blank. Immediately below the shoulder 40 an annular depression 42 receives a resilient plastic or rubber gasket member 44. As will be described more fully hereinafter, the gasket 44, together with the lens blank L and the depression 34 provides a sealed vacuum chamber 46.

A fitting 48 extends outwardly from the peripheral surface 33 and leads to a vacuum source 50 via a flexible tubing 52. The block member 30 is formed with a passageway 54 leading to the vacuum source via fitting 48 and the flexible tubing 52.

The upper surface 38 of the rim 36 has indicia or alignment marks 56 and 58. These alignment marks are matched with indicia previously applied to the lens blank L. The marks'are so placed onthe lens blank by conventional means such as a marking pen or layout marker. 8

In operation, an equipment operator places the lens L as shown in FIG. 6 while orienting the alignment marks. A switch activates the vacuum source 50 which causes chamber 46 to become a sealed vacuum holder. The axial position of the lens is accurately .determined because the lens blank will engage the surface 40. The rim 36 is notched at 56 for alignment with the lens generating chucking equipment. I

A second embodiment of the invention is shownin FIGS. 7 and 8. Here the blocking member has the vacuum source fitting 74 entering the center of the depression with hardened steel inlets and 72'for drive pins. Note that the rim 38 has indicia marks for alignment with the base curve of the lens. The center positioning of fitting 74 reduces vibrations when the block is used with polishing and fining machines of the type mentioned in assignee's co-pending application, Ser. No. 169,224, filed Aug. 5, 1971, entitled POLISHER- FINER MACHINE.

In a general manner, while there has been disclosed an effective and efficient embodiments of the invention, it should be well understood that the invention is not limited to such embodiments as there might be changes made in the arrangement, disposition, and form of the parts without departing from the principle of the present invention as comprehended within the optical orientation of said blank during lens finishing processing, that improvement comprising ery secured in said groove and extending inwardly to define an opening having a diameter less than the diameter of saidupper surface, a vacuum source,

conduit system communicating said vacuum source with said cavity,

said conduit system including a bore through said chucking member,

a flexible hose communicating said bore and said vacuum source, whereby when a lens blank is placed in engagement with said gasket and said vacuum source draws a vacuum in said enclosed cavity, said lens blank seals against said gasket and is securely held to said chucking member.

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US904679 *4 Jun 190724 Nov 1908David A BrutonChuck.
US1503390 *1 Abr 192229 Jul 1924Franklin Baker CompanyParing machine
US2545448 *27 Jun 194720 Mar 1951Gen Optical Company IncApparatus for grinding lenses
US2688220 *16 Abr 19527 Sep 1954Eastman Kodak CoMeans of chucking thin edge lenses
US3015196 *7 Dic 19592 Ene 1962David L CampbellMethod of making spectacle lenses
US3461622 *5 May 196619 Ago 1969Rayford Brooks BDop stick
FR1014564A * Título no disponible
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US3837125 *4 Sep 197324 Sep 1974Celestron PacificMethod and system for making schmidt corrector lenses
US3889431 *23 Sep 197417 Jun 1975Celestron PacificMethod for making schmidt corrector lenses
US3968599 *17 Sep 197413 Jul 1976Harris, Beach & WilcoxLens blocking tools
US4089102 *26 May 197616 May 1978Autoflow Engineering LimitedMethod of forming and using a lens holder
US4184292 *24 Mar 197822 Ene 1980Revlon, Inc.Vacuum chuck
US4267672 *4 Jun 197919 May 1981Cole National CorporationLens processing method
US4841965 *6 Jun 198627 Jun 1989Jacobs Deborah AAnimal holding and position restoring device employing vacuum holder and mouthpiece
US4895102 *29 Oct 198723 Ene 1990Techna Vision IncorporatedSpin coater
US5282305 *6 Feb 19911 Feb 1994Ford Motor CompanyMethod of aligning a striker plate with a latch body of a door latch mechanism
US5335453 *27 Sep 19939 Ago 1994Commissariat A L'energie AtomiquePolishing machine having a taut microabrasive strip and an improved wafer support head
US5520568 *15 Jul 199428 May 1996Minnesota Mining And Manufacturing CompanyMethod of processing a lens and means for use in the method
US5820673 *12 Nov 199613 Oct 1998Sentilles; J. BruceApparatus for applying coatings to lenses and curing the coatings
US6126520 *7 Oct 19963 Oct 2000Raytheon CompanyFixture and methodology for coupling an optical component to a machine
US6463644 *29 Abr 199615 Oct 2002The Paslin CompanyTool for aligning vehicle fender on vehicle during assembly
US75009084 Nov 200410 Mar 2009Essilor InternationalPneumatic blocking support for an optical lens
US8698099 *30 Sep 201015 Abr 2014Kyocera CorporationAttraction member, and attraction device and charged particle beam apparatus using the same
US93212571 Abr 201426 Abr 2016Nike, Inc.Cylinder with recessed portions for holding tubular articles for printing
US938160420 Feb 20135 Jul 2016Schneider Gmbh & Co. KgPreformed block piece with three points of support
US94094141 Abr 20149 Ago 2016Nike, Inc.Vacuum cylinder with recessed portions for holding articles for printing
US94753093 Mar 201625 Oct 2016Nike, Inc.Cylinder with recessed portions for holding tubular articles for printing
US20070105490 *4 Nov 200410 May 2007Armand AchyPneumatic blocking support for an optical lens
US20110073776 *30 Sep 201031 Mar 2011Kyocera CorporationAttraction member, and attraction device and charged particle beam apparatus using the same
US20160052097 *20 Feb 201325 Feb 2016Schneider Gmbh & Co. KgPreformed block piece having a holding surface with an axis that is offset relative to the axis of rotation of the block piece
USRE29878 *20 Ene 19769 Ene 1979Celestron PacificMethod for making replica contour block masters for producing Schmidt corrector plates
WO2005065886A1 *4 Nov 200421 Jul 2005Essilor InternationalPneumatic blocking support for an optical lens
WO2008022978A1 *17 Ago 200728 Feb 2008Essilor International (Compagnie Generale D'optique)Process for holding an optical lens on a holder of a lens machining equipment
Clasificaciones
Clasificación de EE.UU.269/21, 451/390, 279/3
Clasificación internacionalB24B13/005, B25B11/00
Clasificación cooperativaB25B11/007, B24B13/005
Clasificación europeaB24B13/005, B25B11/00C1