DE510251C - Pressform fuer Schallplatten - Google Patents

Pressform fuer Schallplatten

Info

Publication number
DE510251C
DE510251C DEG74899D DEG0074899D DE510251C DE 510251 C DE510251 C DE 510251C DE G74899 D DEG74899 D DE G74899D DE G0074899 D DEG0074899 D DE G0074899D DE 510251 C DE510251 C DE 510251C
Authority
DE
Germany
Prior art keywords
insert
recesses
records
grooves
press mold
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
DEG74899D
Other languages
German (de)
English (en)
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.)
Parlophone Records Ltd
Original Assignee
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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Application granted granted Critical
Publication of DE510251C publication Critical patent/DE510251C/de
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)
DEG74899D 1928-02-01 1928-11-21 Pressform fuer Schallplatten Expired DE510251C (de)

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
DE510251C true DE510251C (de) 1930-10-17

Family

ID=9754699

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG74899D Expired DE510251C (de) 1928-02-01 1928-11-21 Pressform fuer Schallplatten

Country Status (3)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093576B (de) * 1957-03-14 1960-11-24 Philips Nv Pressform zum Heisspressen von Schallplatten aus thermoplastischen Kunststoffen
DE1176833B (de) * 1957-03-14 1964-08-27 Philips Nv Pressform

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093576B (de) * 1957-03-14 1960-11-24 Philips Nv Pressform zum Heisspressen von Schallplatten aus thermoplastischen Kunststoffen
DE1176833B (de) * 1957-03-14 1964-08-27 Philips Nv Pressform

Also Published As

Publication number Publication date
FR664431A (fr) 1929-09-03
GB305364A (en) 1929-02-07

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