GB305364A - Improvements in moulds for pressing talking machine records - Google Patents

Improvements in moulds for pressing talking machine records

Info

Publication number
GB305364A
GB305364A GB324628A GB324628A GB305364A GB 305364 A GB305364 A GB 305364A GB 324628 A GB324628 A GB 324628A GB 324628 A GB324628 A GB 324628A GB 305364 A GB305364 A GB 305364A
Authority
GB
United Kingdom
Prior art keywords
dies
grooves
plug
channels
moulds
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
GB324628A
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.)
ERIC BERGER FERNBERG
Parlophone Records Ltd
Original Assignee
ERIC BERGER FERNBERG
Gramophone Co Ltd
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 ERIC BERGER FERNBERG, Gramophone Co Ltd filed Critical ERIC BERGER FERNBERG
Priority to GB324628A priority Critical patent/GB305364A/en
Priority to DEG74899D priority patent/DE510251C/en
Priority to FR664431D priority patent/FR664431A/en
Publication of GB305364A publication Critical patent/GB305364A/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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B29C33/048—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam using steam
    • 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
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • 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
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

305,364. Gramophone Co., Ltd., and Fernberg, E. B. Feb. 1, 1928. Moulding phonograph records; moulding dies; heating and cooling dies.-Relates to dies of the kind furnished with concentric grooves forming channels for circulation of fluid which are connected through a grooved plug and consists in providing the plug with a number of staggered recesses on opposite sides so that the direction of flow of the fluid is reversed as it passes from one concentric groove to the next. As shown, the die 1 is formed with a shallow recess 2 in the bottom of which are formed concentric grooves 3-8. A radial groove 10 is cut through the channels and is filled by a plug 11 furnished on opposite sides with staggered, semicircular channels 12 adapted to connect adjacent grooves. A plate 15 closes the grooves. The recesses 12 may be other than semicircular.
GB324628A 1928-02-01 1928-02-01 Improvements in moulds for pressing talking machine records Expired GB305364A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB324628A GB305364A (en) 1928-02-01 1928-02-01 Improvements in moulds for pressing talking machine records
DEG74899D DE510251C (en) 1928-02-01 1928-11-21 Press mold for records
FR664431D FR664431A (en) 1928-02-01 1928-11-22 Mold for phonograph records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB324628A GB305364A (en) 1928-02-01 1928-02-01 Improvements in moulds for pressing talking machine records

Publications (1)

Publication Number Publication Date
GB305364A true GB305364A (en) 1929-02-07

Family

ID=9754699

Family Applications (1)

Application Number Title Priority Date Filing Date
GB324628A Expired GB305364A (en) 1928-02-01 1928-02-01 Improvements in moulds for pressing talking machine records

Country Status (3)

Country Link
DE (1) DE510251C (en)
FR (1) FR664431A (en)
GB (1) GB305364A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176833B (en) * 1957-03-14 1964-08-27 Philips Nv Compression mold
DE1093576B (en) * 1957-03-14 1960-11-24 Philips Nv Press mold for hot-pressing records made of thermoplastics

Also Published As

Publication number Publication date
DE510251C (en) 1930-10-17
FR664431A (en) 1929-09-03

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