EP0282606A1 - Cadran de pièce d'horlogerie fluorescent et son procédé de fabrication - Google Patents

Cadran de pièce d'horlogerie fluorescent et son procédé de fabrication Download PDF

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Publication number
EP0282606A1
EP0282606A1 EP87103721A EP87103721A EP0282606A1 EP 0282606 A1 EP0282606 A1 EP 0282606A1 EP 87103721 A EP87103721 A EP 87103721A EP 87103721 A EP87103721 A EP 87103721A EP 0282606 A1 EP0282606 A1 EP 0282606A1
Authority
EP
European Patent Office
Prior art keywords
fluorescent
dial
dark
clock
clock dial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87103721A
Other languages
German (de)
English (en)
Inventor
Sen Yuan Fan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP87103721A priority Critical patent/EP0282606A1/fr
Publication of EP0282606A1 publication Critical patent/EP0282606A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/30—Illumination of dials or hands
    • G04B19/32—Illumination of dials or hands by luminescent substances

Definitions

  • This invention relates primarily to a product which, by an appropriate processing of injection molding, sets to a fluorescent clock dial having superior fluorescent characteristics.
  • insomnia Usually, elderly people tend to be awaken early in the morning. Often, the first thing they would do is to make sure what time it is so that they can decide whether to go back to sleep or to get out of bed. However, it is very inconvenient for an elderly person to look at the time or even to notice the position of the clock while it's still dark. Therefore, he or she must get up from the bed and switch on the light in order to know the time. The worst of the matter is that it is difficult for one to sleep again if he has left his bed even if he is aware that it is still not time to get up. This may cause one to suffer from insomnia.
  • a watch having a hidden bulb therein and a button electrically connected to said bulb has been designed.
  • the bulb illuminates once the button is pressed and the time display can be seen thereby.
  • the hour and minute hands as well as the numeral units of a watch or an alarm clock are covered with or printed with a flourescent layer. In the dark, each particular point is illuminated so as to indicate the present time.
  • the user wants to stay aware of the time in a dark room, he may wear a watch with fluorescent hour and minute hands or a watch having a hidden bulb. However, it is inconvenient and uncomfortable to wear a watch while sleeping.
  • the invention as claimed is intended to remedy these drawbacks. It enables the users to know the present time even in a dark environment.
  • a clock dial 1 constructed in accordance with the present invention comprises a fluorescent dial 2, two dark coloured pointers 3 (i.e. hour and minute hands) and a plurality of dark coloured numeral units 4.
  • the raw material infeed is plastic, preferably granular plastic, such as polyethylene (PE), polypropylene (PP) and the like.
  • the other raw material is fluorescent powder, such as LUMILUX GREEN 50,000.
  • the product material may become brittle or fragile.
  • an excess of fluorescent material results in a decrease of tensile yield and toughness.
  • the material obtained therefrom is easily broken or torn when further processing.
  • flourescent material is preferably used for each 100g of plastic material. More preferably, 2 g of fluorescent material is used for 100g of plastic material.
  • the temperature when carrying out the mixing process is preferably at the temperature of about 200 to 250°C. In a preferred embodiment, the temperature should be set to 225°C if the product weighs 300 g. In another preferred embodiment, the temperature should be set to about 240°C if the amount of end product desired weights 500g.
  • Exceeding the recommended temperature may destroy the structure of the mixing product while too low a temperature results in a loosely packed combination of fluorescent material and plastic material and therefore, fluorescent powder may peel of eventually.
  • the qualities of the product obtained will be affected by the temperature and the proportion of each raw material.
  • FIG. 2 discloses a flow diagram of a manufacturing process in accordance with the present invention having the following steps:
  • the fluorescent clock dial can be manufactured readily in large amounts.
  • the concept of this invention differs from conventional configuration in that the present invention has a fluorescent dial together with two dark-coloured pointers and a plurality of dark-coloured numeral units to shade the brightness while conventional designation has only several fluorescent points.
  • the fluorescent performance and the time-­indicating ability of the clock dial produced in this manner is superior to the conventional product.
  • the process for producing this product is of low cost and can be carried out readily.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP87103721A 1987-03-14 1987-03-14 Cadran de pièce d'horlogerie fluorescent et son procédé de fabrication Withdrawn EP0282606A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP87103721A EP0282606A1 (fr) 1987-03-14 1987-03-14 Cadran de pièce d'horlogerie fluorescent et son procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87103721A EP0282606A1 (fr) 1987-03-14 1987-03-14 Cadran de pièce d'horlogerie fluorescent et son procédé de fabrication

Publications (1)

Publication Number Publication Date
EP0282606A1 true EP0282606A1 (fr) 1988-09-21

Family

ID=8196833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87103721A Withdrawn EP0282606A1 (fr) 1987-03-14 1987-03-14 Cadran de pièce d'horlogerie fluorescent et son procédé de fabrication

Country Status (1)

Country Link
EP (1) EP0282606A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022062A1 (fr) * 1993-03-18 1994-09-29 Billight S.A. Element luminescent
WO1997008592A1 (fr) * 1995-08-28 1997-03-06 Promatec Systems S.A. Procede pour le moulage et l'application de signes sur une surface
EP1422031A1 (fr) * 2002-11-19 2004-05-26 Spellbound Development Group Dispositif de coupe de sécurité
US7374323B1 (en) 2005-07-28 2008-05-20 Yazaki North America, Inc. Self-illumination applique system and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2395185A (en) * 1942-08-13 1946-02-19 Gen Luminescent Corp Production of luminescent dials
CH265250A (de) * 1947-10-06 1949-11-30 Ag Teseco Zifferblatt für Uhren und Apparate.
FR1081957A (fr) * 1953-05-15 1954-12-24 Perfectionnements aux objets lumineux dans l'obscurité
FR1131289A (fr) * 1955-09-16 1957-02-19 Manuf Horlogerie Bethune Cadran pour réveils, pendules, montres et articles analogues
JPS5734478A (en) * 1980-08-12 1982-02-24 Ricoh Elemex Corp Watch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2395185A (en) * 1942-08-13 1946-02-19 Gen Luminescent Corp Production of luminescent dials
CH265250A (de) * 1947-10-06 1949-11-30 Ag Teseco Zifferblatt für Uhren und Apparate.
FR1081957A (fr) * 1953-05-15 1954-12-24 Perfectionnements aux objets lumineux dans l'obscurité
FR1131289A (fr) * 1955-09-16 1957-02-19 Manuf Horlogerie Bethune Cadran pour réveils, pendules, montres et articles analogues
JPS5734478A (en) * 1980-08-12 1982-02-24 Ricoh Elemex Corp Watch

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 100 (P-121)[978], 9th June 1982; & JP-A-57 034 478 (RICOH TOKEI K.K.) 24-02-1982 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022062A1 (fr) * 1993-03-18 1994-09-29 Billight S.A. Element luminescent
CH687289GA3 (fr) * 1993-03-18 1996-11-15 Promatec Systems Sa Elément luminescent et procédé de fabrication d'un élément luminescent.
WO1997008592A1 (fr) * 1995-08-28 1997-03-06 Promatec Systems S.A. Procede pour le moulage et l'application de signes sur une surface
CH689345GA3 (fr) * 1995-08-28 1999-03-15 Promatec Systems Sa Procédé pour le moulage et le transfert de signes sur une surface et outillage pour sa mise en oeuvre.
US6113726A (en) * 1995-08-28 2000-09-05 Promatec Systems S.A. Method of moulding and applying marks on a surface
EP1422031A1 (fr) * 2002-11-19 2004-05-26 Spellbound Development Group Dispositif de coupe de sécurité
US7374323B1 (en) 2005-07-28 2008-05-20 Yazaki North America, Inc. Self-illumination applique system and method

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