GB326765A - Improvements in gramophone records and the method of manufacture - Google Patents

Improvements in gramophone records and the method of manufacture

Info

Publication number
GB326765A
GB326765A GB3692728A GB3692728A GB326765A GB 326765 A GB326765 A GB 326765A GB 3692728 A GB3692728 A GB 3692728A GB 3692728 A GB3692728 A GB 3692728A GB 326765 A GB326765 A GB 326765A
Authority
GB
United Kingdom
Prior art keywords
cellulose
sheets
impressed
grooves
cemented together
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
GB3692728A
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 GB3692728A priority Critical patent/GB326765A/en
Publication of GB326765A publication Critical patent/GB326765A/en
Expired legal-status Critical Current

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  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

326,765. Thornton. J. E. Dec. 14, 1928. Compound sheet materials.-Gramophone records are made of preformed sheets of regenerated cellulose, produced by precipitating the cellulose from viscose, i.e. a solution of cellulose xanthate, the sound-grooves being impressed in the usual manner, in one or both faces of the cellulose, preferably by using heated dies. When two or more sheets are used, they are cemented together before the grooves are impressed. Fillers such as barytes, pigments, or substances such as gums or resins may be incorporated with the cellulose. The material may be chemically hardened-superficially or throughout its mass by treatment with an agent such as formalin or alum. Flexing agents such as oils, glycerine, or sugars, may also be used. A multi-layer disc may be formed with the two outer sheets slightly larger than the interior, the two overhanging portions being turned over and cemented together to form a rounded edge.
GB3692728A 1928-12-14 1928-12-14 Improvements in gramophone records and the method of manufacture Expired GB326765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3692728A GB326765A (en) 1928-12-14 1928-12-14 Improvements in gramophone records and the method of manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3692728A GB326765A (en) 1928-12-14 1928-12-14 Improvements in gramophone records and the method of manufacture

Publications (1)

Publication Number Publication Date
GB326765A true GB326765A (en) 1930-03-14

Family

ID=10392310

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3692728A Expired GB326765A (en) 1928-12-14 1928-12-14 Improvements in gramophone records and the method of manufacture

Country Status (1)

Country Link
GB (1) GB326765A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022078A (en) * 1956-01-25 1962-02-20 Tdk Electronics Co Ltd Magnetic record sheet for a magnetic recording and reading apparatus
US3689078A (en) * 1969-06-30 1972-09-05 Yasujiro Ban Colored recording discs
US4277071A (en) * 1977-02-18 1981-07-07 E M I Limited Disc records having surface markings
US5799008A (en) * 1993-02-26 1998-08-25 Sony Corporation Casing having multiple printed layers which provide a protected decorative area and unprotected area on which writing can be formed

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022078A (en) * 1956-01-25 1962-02-20 Tdk Electronics Co Ltd Magnetic record sheet for a magnetic recording and reading apparatus
US3689078A (en) * 1969-06-30 1972-09-05 Yasujiro Ban Colored recording discs
US4277071A (en) * 1977-02-18 1981-07-07 E M I Limited Disc records having surface markings
US5799008A (en) * 1993-02-26 1998-08-25 Sony Corporation Casing having multiple printed layers which provide a protected decorative area and unprotected area on which writing can be formed

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