US3747241A - Self-cleaning steam iron - Google Patents

Self-cleaning steam iron Download PDF

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Publication number
US3747241A
US3747241A US00187010A US3747241DA US3747241A US 3747241 A US3747241 A US 3747241A US 00187010 A US00187010 A US 00187010A US 3747241D A US3747241D A US 3747241DA US 3747241 A US3747241 A US 3747241A
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United States
Prior art keywords
tank
steam
soleplate
water
opening
Prior art date
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Expired - Lifetime
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US00187010A
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English (en)
Inventor
W Davidson
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EssilorLuxottica SA
General Electric Co
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General Electric Co
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22687243&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US3747241(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US3747241A publication Critical patent/US3747241A/en
Assigned to BLACK & DECKER, INC., A CORP. OF DE reassignment BLACK & DECKER, INC., A CORP. OF DE ASSIGNS AS OF APRIL 27, 1984 THE ENTIRE INTEREST Assignors: GENERAL ELECTRIC COMPANY A NY CORP.
Assigned to ESSILOR INTERNATIONAL CIE GENERALE D'OPTIQUE reassignment ESSILOR INTERNATIONAL CIE GENERALE D'OPTIQUE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BRULE, FRANCOIS, CHANSAVOIR, ALAIN
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/14—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron
    • D06F75/18—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron the water being fed slowly, e.g. drop by drop, from the reservoir to a steam generator

Definitions

  • ABSTRACT The invention is directed to a self-cleaning steam iron ,with means to purge the iron of water and steam through the soleplate by providing a substantially large opening in the irons water tank separate and distinct from the metering orifice through which water is normally dripped to make steam such as in flash boiler type irons.
  • the large opening empties directly onto the soleplate.
  • a valve means is provided to control this opening so the water in the tank can be suddenly dumped onto the hot soleplate so that, with the additional steam suddenly generated, substantially the entire tank, steam distribution system, and ports are completely and forcefully purged of water, steam, loose'residues, and entrapped lint.
  • the invention herein pertains to a steam iron and, more particularly, to a self-cleaning steam iron which employs a substantially and separate large opening in the internal water tank whereby the tank may be suddenly emptied and the resultant gush of water and steam substantially completely purges the iron.
  • the steam ports in the soleplate tend to collect lint from the ironing operation and some of this lint may subsequently find its way into the internal passage structure when the iron is upended and not in use.
  • the tap water contains minerals which produce loose flakes and deposits that plate out on the iron components and clog the fine passages in the iron. These deposits, which vary around the country, generally consist of lime or calcium carbonate as well as other chemicals that are in solution in the water or may be in relatively large flake-form in the water.
  • Various screens have been used to keep the fine passageways clear of flakes but eventually even these screens plug up.
  • the present invention is directed to a steam iron that has a fill opening to an interior water tank and a steam generating soleplate with ports therein and which uses an on and off water valve to control a metered flow of water from the tank through an orifice and onto the soleplate to generate steam.
  • a flash boiler steam iron This is known as a flash boiler steam iron.
  • Such irons may also have manual or power spray structure.
  • the invention provides an improvement in means to completely and forcefully purge the iron of water and steam through the soleplate.
  • This includes a separate substantially large opening in the water tank spaced from and operable independently of the metering orifice. The large opening connects directly with the inner and preferably hottest surface of the soleplate.
  • the large opening is valve controlled by separately operable means on the iron handle so that the water in the tank can be suddenly dumped directly onto the hot soleplate to by-pass the orifice and empty the tank rapidly through the soleplate ports.
  • additional known structure to seal off the fill hole and close the interior of the iron to ambient pressure while steaming as well as balance tube means to equalize the pressure in closed systems may be used.
  • by sizing the parts it is possible to generate steam pressure to assist in dumping the tank and rapidly purge the entire iron.
  • the main object of the invention is to provide an improvement to any steam iron which rapidly dumps the water tank in a quick action to substantially completely purge the iron and make it self-cleaning.
  • FIG. 1 is an elevational view, partially in section and broken away, showing general parts of a power spray iron with the invention pictorially applied;
  • FIG. 2 is a partially broken perspective enlarged to show the actual dumping valve structure of FIG. 1;
  • FIG. 3 is a view similar to FIG. 1 as applied to a manual spray iron.
  • FIG. 4 is a front elevational view of a typical iron showing the location of the handle operating means.
  • the invention will be described in connection with a spray-steam iron of either the power or manual type although it should be understood that the invention is applicable to steam irons alone of the flooded boiler type as shown in U.S. Pat. No. 3,156,054, non-flash boiler type shown in U.S. Pat. No. 2,810,218, both of common assignment, or the more common flash boiler type described herein with or without the spray attachment.
  • the invention discloses a self-cleaning iron where, on pushing a button, water and steam flush through soleplate ports forcing substantially all loose mineral deposits and scorched lint from the iron. This is the intent of completely purge" or completely self-cleaning" and the like as used herein. Referring first to FIG.
  • Soleplate 10 may be cast aluminum with an electrical heating element 18 cast in position.
  • the heating element is generally of the sheathed type and extends in a loop beginning at the rear of the iron along one side to the forward end and then rearwardly along the other side. Thus, substantially uniform heat distribution is provided to the soleplate.
  • the iron includes means for generating steam by providing interior water tank 20 which may have a vertical outer suitably shaped riser tube means 22 in the forward portion for housing various operating mechanisms.
  • soleplate 10 boiler a steam generator cavity or oiler 24 to receive metered water.
  • the water is started and stopped or controlled by water valve structure generally indicated at 26 and activated by steam control means such as button 28 and connected spring-biased vertical stem 30. Water is metered through an orifice as represented by passage 32, and
  • a pressure balancing tube 48 to connect the interior of the water tank with the steam boiler 24 so pressure is equalized on both sides of water valve 26 and water will drip at a constant rate for steam generation.
  • a suitable steam pressure valve generally indicated at 50 is provided in a separate tube adjacent balance tube 48 as seen in FIG. 2 which separate tube is also open at its lower end like balance tube 48 and open at its other end adjacent the sprayer as seen in FIG.
  • Both tubes 48 and 50 are brought into a lower domed portion 52, separate or formed in the bottom of tank 20, which provides a steam dome over steam boiler 24.
  • steam from boiler 24 may pass directly down into the soleplate when steam pressure operates valve 50 and it may also pass directly up balance tube 48 to equalize pressure as well as up adjacent tube means 50 if and when a sprayer 38 is used.
  • the operation thus far described is known as a power spray iron and is shown in US. Pat. 3,041,757 of common assignment. In such irons, it is customary to drain the iron after operation by depressing button 28 thus opening valve 46 to ambient and turning the iron nose down whereby the water drains out fill opening 44 and most of the water is removed from tank 20.
  • the bottom of tank 20 is provided with a substantially large opening 54 that is spaced and separate from the usual metering orifice at 32.
  • Many equivalent forms may be used to provide the large opening, such as a concentric annulus around the metering orifice 32 as visualized in FIG. 2, or any other functional equivalent.
  • This opening is thus defined as substantially large” and spaced that may be separate and is intended to include any additional unrestricted flow opening that rapidly empties the tank and functions other than as the small restricted flow metering orifice and which bypasses the metering orifice.
  • this is in the form of a separate and distinctly spaced bottom opening 54 as an illustrative example as shown in FIG. 2.
  • This opening is conveniently adjacent the tubes and, in effect, is a plugged hole in the bottom of water tank 20 to rapidly dump the tank.
  • the opening 54 in order to obtain control and additional useful effects from the rapid emptying, the opening 54, as
  • a directing shroud 56 that passes through a matching opening 58 in coverplate 36, that connects the openings and communicates directly with the soleplate by being brought down close to but spaced from the inner surface of soleplate 10 as shown in FIG. 1.
  • Dumping of the water from tank 20 is under control of a piston-like lobed valve means generally indicated at 60 that operates in the shroud and opens or closes opening 54 and is biased to the up or closed position by spring 62, the valve being shown open in FIG. 2.
  • the dumped water passes through opening 54 and around the lobes which are guided by shroud 56.
  • valve 60 permits most of the water in tank 20 to bypass the orifice 32 and immediately dump onto the hot soleplate and flow into passages 34 and out ports 12.
  • the location and orientation of the water dump is important.
  • the coverplate opening 58 is arranged directly above the hottest part of the soleplate adjacent heater element 18. While this is not completely necessary it is preferable because it provides a large quantity of flash steam with subsequent benefits as will become apparent.
  • the dumped water from tank 20 must escape below the shroud in order to reach ports 12 and exit from the iron. Because of the direction of the shroud toward the inner soleplate surface, the water has difficulty mom entarily in spreading and escaping under the shroud. At the same time, because the water is dumped on the hottest part of the soleplate, a large quantity of steam is generated. This combination of water and steam thus interferes with the normal steam flow from generator 24 to the ports with the result that the pressure control valve 50 may be slightly delayed in opening. Consequently, since the iron is still generating steam in boiler 24, the pressure on the surface of the water in the tank is increased momentarily.
  • FIG. 3 a similar valve structure is shown as applied to a manual spray iron and like numerals refer to like parts.
  • the iron again is shown as a system closed to ambient where, during steaming, fill hole 44 is sealed by valve mechanism 26 as described in connection with FIG. 1.
  • valve mechanism 26 as described in connection with FIG. 1.
  • spray control button 40 is connected to operate a diaphragm pump generally indicated at 68 and of the type shown in the abovereferenced US. Pat. No. 3,183,611.
  • the bottom of water tank 20 is provided with a substantially large opening 70 that is separate and spaced from the metering orifice 32 and this opening is extended by shroud 72 to communicate directly with the inner surface of soleplate at or near the hottest part of the soleplate. Passage of water for dumping from tank to the soleplate is under control of valve 74 that has a spring-biased stem 76 operated by button 66.
  • the shroud 72 is extended through a matching opening 78 in the coverplate to connect directly with the inner surface of the soleplate.
  • a suitable steam opening may be provided such as by putting the shroud close to but slightly spaced from the coverplate to provide an annulus 80 for the normal passage of steam from generator 24 to passages 34 and ports 12.
  • the metering orifice 32 is substantially bypassed and the water tank 20 is completely dumped immediately onto the hot soleplate where a large quantity of steam is quickly generated and the mixture of water and steam passing under the shroud and into the steam path tends briefly to impede the normal flow of steam through annulus 80 and to ports 12, the impeding means consisting at least partly of the dumping water.
  • Apparatus as described in claim 3 having a balance tube connecting the steam generating portion of the soleplate and the interior of said tank.
  • Apparatus as described in claim 5 having means impeding the normal generated steam flow to said ports on tank dumping whereby increased steam pressure to said tank interior assists said emptying.
  • a steam iron having a fill opening to an interior water tank and a steam generating soleplate with ports therein, an on-off water valve to start and stop a metered flow of water from said tank through an orifice and onto the soleplate to generate steam, the improvement in means to purge said iron of water and steam through the soleplate comprising,
  • Apparatus as described in claim 11 having a balance tube connecting the steam generating portion of the soleplate and the interior of said tank.
  • Apparatus as described in claim 13 having means impeding the normal generated steam flow to said ports on tank dumping whereby increased steam pressure to said tank interior assists said emptying.
  • a steam iron having a fill opening to an interior water tank and a steam generating soleplate with ports therein, a coverplate spaced from said tank and over the soleplate to direct and distribute steam to said ports, and on-off water valve to start and stop a metered flow of water from said tank through an orifice and onto the soleplate to generate steam, and means to control said water valve from the handle of said iron, the improvement in means to purge said iron of water and steam through the soleplate comprising,
  • valve means operable in said shroud to open and close said connection
  • Apparatus as described in claim 19 having a balance tube connecting the steam generating portion below the coverplate and the interior of said tank.
  • Apparatus as described in claim 21 having means impeding the normal generated steam flow to said ports on tank dumping whereby increased steam pressure to said tank interior assists said emptying.
  • Apparatus as described in claim 22 having a pressure control valve to maintain a constant steam pressure upstream of said coverplate.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Irons (AREA)
US00187010A 1971-10-06 1971-10-06 Self-cleaning steam iron Expired - Lifetime US3747241A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18701071A 1971-10-06 1971-10-06

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US (1) US3747241A (enrdf_load_stackoverflow)
JP (1) JPS5126556B2 (enrdf_load_stackoverflow)
FR (1) FR2156103B1 (enrdf_load_stackoverflow)
GB (1) GB1410183A (enrdf_load_stackoverflow)
IT (1) IT968433B (enrdf_load_stackoverflow)
NL (1) NL177426C (enrdf_load_stackoverflow)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823498A (en) * 1973-04-26 1974-07-16 Gen Electric Self cleaning steam iron
US3849916A (en) * 1972-11-10 1974-11-26 Gen Electric Self-cleaning steam iron
US3869816A (en) * 1974-01-30 1975-03-11 Gen Electric Steam iron
US3983644A (en) * 1975-12-03 1976-10-05 General Electric Company Flash/flooded boiler steam iron
US4017988A (en) * 1976-04-07 1977-04-19 General Electric Company Self-cleaning steam iron
US4086714A (en) * 1977-05-05 1978-05-02 General Electric Company Steam iron baffling
US4130954A (en) * 1977-10-11 1978-12-26 General Electric Company Iron self-clean valve assembly
US4180928A (en) * 1978-07-17 1980-01-01 General Electric Company Self-clean steam iron
DE2943475A1 (de) * 1978-10-27 1980-05-08 Gen Electric Dampfbuegeleisen
US4213258A (en) * 1978-10-23 1980-07-22 General Electric Company Steam iron water gauge
US4244124A (en) * 1979-11-16 1981-01-13 General Electric Company Steam iron and baffling
US4277900A (en) * 1980-04-04 1981-07-14 General Electric Company Iron steam chamber construction
US4285145A (en) * 1979-06-25 1981-08-25 General Electric Company Thermostat and iron assembly
US4345389A (en) * 1980-09-15 1982-08-24 General Electric Company Thermostat and iron assembly
DE3204796A1 (de) * 1981-02-14 1982-09-23 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Dampfbuegeleisen
US4523079A (en) * 1983-09-20 1985-06-11 Black & Decker Inc. Electric iron having electronic control circuit with a power resistor mounted on the soleplate
US4536641A (en) * 1984-01-26 1985-08-20 Black & Decker, Inc. Iron with overtemperature protection means
US5829175A (en) * 1996-09-20 1998-11-03 Black & Decker Inc. Steam iron with all temperature steam production
WO2009080495A1 (de) 2007-12-21 2009-07-02 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung zum bügeln
EP2963173A1 (de) * 2014-07-02 2016-01-06 BSH Hausgeräte GmbH Verfahren zum reinigen eines dampfbügeleisens sowie dampfbügelstation
US20170275811A1 (en) * 2014-08-26 2017-09-28 Koninklijke Philips N.V. Hand-held steaming device
IT201900016862A1 (it) * 2019-09-20 2021-03-20 De Longhi Appliances Srl Gruppo piastra per un ferro da stiro
RU2819532C1 (ru) * 2019-09-20 2024-05-21 Де'Лонги Апплайэнсиз С.Р.Л. Кон Унико Сочио Нагревательный узел парового утюга

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4957195A (enrdf_load_stackoverflow) * 1972-10-05 1974-06-03
JPS51107987U (enrdf_load_stackoverflow) * 1975-02-20 1976-08-28
FR2813894B1 (fr) 2000-09-12 2002-12-06 Rowenta Werke Gmbh Fer a vapeur auto nettoyant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US580135A (en) * 1897-04-06 Flat-iron
US2708801A (en) * 1953-09-01 1955-05-24 Jacob D Voskresenski Electric steam iron
US3045370A (en) * 1959-04-15 1962-07-24 Gen Electric Steam iron with position controlled valve
US3130507A (en) * 1957-06-28 1964-04-28 Albert C Hoecker Steam and dampening iron
US3238649A (en) * 1964-09-17 1966-03-08 Gen Electric Steam iron boiler cleaning

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165843A (en) * 1962-05-14 1965-01-19 Mc Graw Edison Co Jet steam iron
BE756196A (fr) * 1969-09-17 1971-03-16 Sunbeam Corp Fer a repasser utilisant la vapeur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US580135A (en) * 1897-04-06 Flat-iron
US2708801A (en) * 1953-09-01 1955-05-24 Jacob D Voskresenski Electric steam iron
US3130507A (en) * 1957-06-28 1964-04-28 Albert C Hoecker Steam and dampening iron
US3045370A (en) * 1959-04-15 1962-07-24 Gen Electric Steam iron with position controlled valve
US3238649A (en) * 1964-09-17 1966-03-08 Gen Electric Steam iron boiler cleaning

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849916A (en) * 1972-11-10 1974-11-26 Gen Electric Self-cleaning steam iron
US3823498A (en) * 1973-04-26 1974-07-16 Gen Electric Self cleaning steam iron
US3869816A (en) * 1974-01-30 1975-03-11 Gen Electric Steam iron
US3983644A (en) * 1975-12-03 1976-10-05 General Electric Company Flash/flooded boiler steam iron
US4017988A (en) * 1976-04-07 1977-04-19 General Electric Company Self-cleaning steam iron
FR2347484A1 (fr) * 1976-04-07 1977-11-04 Gen Electric Fer a repasser a vapeur auto-nettoyant
US4086714A (en) * 1977-05-05 1978-05-02 General Electric Company Steam iron baffling
US4130954A (en) * 1977-10-11 1978-12-26 General Electric Company Iron self-clean valve assembly
FR2406019A1 (fr) * 1977-10-11 1979-05-11 Gen Electric Soupape de decharge pour fer a vapeur autonettoyant
US4180928A (en) * 1978-07-17 1980-01-01 General Electric Company Self-clean steam iron
US4213258A (en) * 1978-10-23 1980-07-22 General Electric Company Steam iron water gauge
DE2943475A1 (de) * 1978-10-27 1980-05-08 Gen Electric Dampfbuegeleisen
FR2439841A1 (fr) * 1978-10-27 1980-05-23 Gen Electric Robinet selecteur de mode pour fer a repasser a vapeur
US4285145A (en) * 1979-06-25 1981-08-25 General Electric Company Thermostat and iron assembly
US4244124A (en) * 1979-11-16 1981-01-13 General Electric Company Steam iron and baffling
FR2479868A1 (fr) * 1980-04-04 1981-10-09 Gen Electric Fer a repasser a vapeur perfectionne
US4277900A (en) * 1980-04-04 1981-07-14 General Electric Company Iron steam chamber construction
DE3112131A1 (de) * 1980-04-04 1982-01-14 General Electric Co., Schenectady, N.Y. "dampfbuegeleisen"
US4345389A (en) * 1980-09-15 1982-08-24 General Electric Company Thermostat and iron assembly
DE3204796A1 (de) * 1981-02-14 1982-09-23 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Dampfbuegeleisen
US4459771A (en) * 1981-02-14 1984-07-17 Matsushita Electric Industrial Co., Ltd. Self cleaning steam iron
US4523079A (en) * 1983-09-20 1985-06-11 Black & Decker Inc. Electric iron having electronic control circuit with a power resistor mounted on the soleplate
US4536641A (en) * 1984-01-26 1985-08-20 Black & Decker, Inc. Iron with overtemperature protection means
US5829175A (en) * 1996-09-20 1998-11-03 Black & Decker Inc. Steam iron with all temperature steam production
WO2009080495A1 (de) 2007-12-21 2009-07-02 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung zum bügeln
EP2963173A1 (de) * 2014-07-02 2016-01-06 BSH Hausgeräte GmbH Verfahren zum reinigen eines dampfbügeleisens sowie dampfbügelstation
US20170275811A1 (en) * 2014-08-26 2017-09-28 Koninklijke Philips N.V. Hand-held steaming device
US10081904B2 (en) * 2014-08-26 2018-09-25 Koninklijke Philips N.V. Hand-held steaming device
IT201900016862A1 (it) * 2019-09-20 2021-03-20 De Longhi Appliances Srl Gruppo piastra per un ferro da stiro
WO2021053702A1 (en) * 2019-09-20 2021-03-25 De' Longhi Appliances S.R.L. Con Unico Socio Plate unit for a steam iron
CN114729497A (zh) * 2019-09-20 2022-07-08 德隆奇电器单一股东有限责任公司 用于蒸汽熨斗的板单元
RU2819532C1 (ru) * 2019-09-20 2024-05-21 Де'Лонги Апплайэнсиз С.Р.Л. Кон Унико Сочио Нагревательный узел парового утюга
CN114729497B (zh) * 2019-09-20 2024-06-25 德隆奇电器单一股东有限责任公司 用于蒸汽熨斗的板单元

Also Published As

Publication number Publication date
FR2156103B1 (enrdf_load_stackoverflow) 1976-08-20
FR2156103A1 (enrdf_load_stackoverflow) 1973-05-25
JPS4845690A (enrdf_load_stackoverflow) 1973-06-29
NL177426B (nl) 1985-04-16
DE2248639A1 (de) 1973-04-12
AU4732572A (en) 1974-04-11
GB1410183A (en) 1975-10-15
DE2248639B2 (de) 1976-01-22
NL7213322A (enrdf_load_stackoverflow) 1973-04-10
IT968433B (it) 1974-03-20
NL177426C (nl) 1985-09-16
JPS5126556B2 (enrdf_load_stackoverflow) 1976-08-06

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BLACK & DECKER, INC., 1423 KIRKWOOD HIGHWAY NEWARK

Free format text: ASSIGNS AS OF APRIL 27, 1984 THE ENTIRE INTEREST;ASSIGNOR:GENERAL ELECTRIC COMPANY A NY CORP.;REEL/FRAME:004349/0275

Effective date: 19840824

AS Assignment

Owner name: ESSILOR INTERNATIONAL CIE GENERALE D'OPTIQUE,FRANC

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BRULE, FRANCOIS;CHANSAVOIR, ALAIN;REEL/FRAME:004867/0044

Effective date: 19880420

Owner name: ESSILOR INTERNATIONAL CIE GENERALE D'OPTIQUE, 1 RU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:BRULE, FRANCOIS;CHANSAVOIR, ALAIN;REEL/FRAME:004867/0044

Effective date: 19880420