GB704735A - A method for the manufacture of key buttons for typewriters, calculating machines or the like - Google Patents

A method for the manufacture of key buttons for typewriters, calculating machines or the like

Info

Publication number
GB704735A
GB704735A GB2653452A GB2653452A GB704735A GB 704735 A GB704735 A GB 704735A GB 2653452 A GB2653452 A GB 2653452A GB 2653452 A GB2653452 A GB 2653452A GB 704735 A GB704735 A GB 704735A
Authority
GB
United Kingdom
Prior art keywords
cup
disc
typewriters
line
manufacture
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.)
Expired
Application number
GB2653452A
Inventor
Miloslav Simunek
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.)
Minerva Boskovice AS
Original Assignee
Minerva Boskovice AS
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 Minerva Boskovice AS filed Critical Minerva Boskovice AS
Priority to GB2653452A priority Critical patent/GB704735A/en
Publication of GB704735A publication Critical patent/GB704735A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0033—Moulds or cores; Details thereof or accessories therefor constructed for making articles provided with holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/021—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps
    • B29C39/023—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps for making multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/72—Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/466—Keypads, keytops
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H2011/0081—Apparatus or processes specially adapted for the manufacture of electric switches using double shot moulding, e.g. for forming elastomeric sealing elements on form stable casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/18—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Manufacture Of Switches (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

704,735. Calculating apparatus. MINERVA BOSKOVICE NARODNI PODNIK. July 4, 1952, No. 26534/52. Divided out of 25458/49, as open to inspection under Sect. 91. Class 106 (1). [Also in Groups V and XVI] A method for the manufacture of moulded plastic keys for typewriters, calculating machines and the like which comprise a carrier member 2 consisting of a disc-like portion provided at its upper face with projecting characters 4 having completely enclosed interspaces 4a and at its opposite face with a neck 3 having an axial cavity 6 to receive the ends of an operating lever, and a cup-like member surrounding the member 2 in a space 1a, is characterized in that firstly the member 2 is cast in one mould with core pins placed to form channels 10<SP>1</SP>, 11<SP>1</SP> extending from the brim of the disc-like portion so that when the cup-like member is moulded around the member 2 in moulds 7, 8 the plastic material from which the keys are formed may extend into the interspaces 4a. The moulds are formed so that the dividing line between the two halves is in line with the lower face of the disc on the member 2 and in line with the lower edge of the rim in the cup-like member. The axial cavity 6 is formed with ribs to increase the resilence of the neck 3. Specification 521,056, [Group V], is referred to.
GB2653452A 1952-07-04 1952-07-04 A method for the manufacture of key buttons for typewriters, calculating machines or the like Expired GB704735A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2653452A GB704735A (en) 1952-07-04 1952-07-04 A method for the manufacture of key buttons for typewriters, calculating machines or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2653452A GB704735A (en) 1952-07-04 1952-07-04 A method for the manufacture of key buttons for typewriters, calculating machines or the like

Publications (1)

Publication Number Publication Date
GB704735A true GB704735A (en) 1954-02-24

Family

ID=10245148

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2653452A Expired GB704735A (en) 1952-07-04 1952-07-04 A method for the manufacture of key buttons for typewriters, calculating machines or the like

Country Status (1)

Country Link
GB (1) GB704735A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2580983A1 (en) * 1985-04-24 1986-10-31 Bellignite Sa Two-coloured or multi-coloured containers produced from two or more plastics of different colours, especially by dual- or multi-injection moulding, and having decorative designs or the like made in one or more colours, and process for obtaining them

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2580983A1 (en) * 1985-04-24 1986-10-31 Bellignite Sa Two-coloured or multi-coloured containers produced from two or more plastics of different colours, especially by dual- or multi-injection moulding, and having decorative designs or the like made in one or more colours, and process for obtaining them

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