US3072519A - Method of making phonograph record blanks from composite material - Google Patents

Method of making phonograph record blanks from composite material Download PDF

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Publication number
US3072519A
US3072519A US75800658A US3072519A US 3072519 A US3072519 A US 3072519A US 75800658 A US75800658 A US 75800658A US 3072519 A US3072519 A US 3072519A
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Prior art keywords
method
composite material
roll
paper
phonograph record
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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 - Lifetime
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Salzman Samuel
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ALLIED RECORD Manufacturing CO
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ALLIED RECORD Manufacturing CO
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D17/00Producing carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records; Producing record discs from master stencils
    • B29D17/002Producing phonograph records
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/68Record carriers
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/68Record carriers
    • G11B3/70Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/81Sound record
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S493/00Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/946Phonograph record jacket
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007Running or continuous length work
    • Y10T156/1008Longitudinal bending
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007Running or continuous length work
    • Y10T156/1008Longitudinal bending
    • Y10T156/101Prior to or during assembly with additional lamina
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1039Surface deformation only of sandwich or lamina [e.g., embossed panels]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1052Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1052Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1056Perforating lamina
    • Y10T156/1057Subsequent to assembly of laminae

Description

Jan. 8, 1963 s. SALZMAN 3,072,519

METHOD OF MAKING PHQNOGRAPH RECORD BLANKS FROM COMPOSITE MATERIAL Filed Aug. 29, 1958 FIG. 1.

1' SHMAEZ 50 2,444 i v JNVENTOR.

United States Patent Qfiice 3,072,519 METHOD OF MAKING PHONOGRAPI-I RECORD BLANKS FROM COMPOSITE MATERIAL Samuel Salzrnan, North Hollywood, Calif., assiguor to Allied Record Manufacturing Co., Los Angeles, Calif., a corporation oi. California Filed Aug. 29, 1958, Ser. No. 758,006 1 Claim. (Cl. 156-200) This invention relates to a method and apparatus for making phonograph records and more particularly to such a method and apparatus for continuously coating paper with a controlled thickness of a special resin, stamping into the resinous surface the sound grooves in two side-by-side positions on the roll, folding the resin coated and stamped paper about a central core and then die cutting the resulting blank records from the roll.

It is accordingly one object of this invention to provide such a continuous process of making record blanks.

It is another object of this invention to provide a method and apparatus for manufacturing phonograph records which is simple, economical and easy to control.

These and other objects, features and advantages will be apparent from the annexed specification, in which:

FIGURE 1 is a side view partly in section of a device embodying the present invention.

FIGURE 2 is a perspective elevation of the stamping roll and dies.

FIGURE 3 is a section taken along the line 33 of FIGURE 1.

Referring now more particularly to the drawings and particularly to FIGURE 1, there is provided a roll 28 of suitable paper from which the paper is unrolled and passed over a support 11 adjacent which it receives a coating 12 of a special resin from the resin applicator 13, the thickness of which coating is controlled by an adjustable doctor blade 14. The resin is applied hot and in liquid form, but the distance between the doctor blade 14 and the stamping roll 15 in practice is adjusted to be sufficient so that the resin coating 12 has cooled and solidified prior to reaching the stamping roll 15. Stamping roll 15 cooperates with a roll 16 which is provided with a cover 17 of a resilient material such as rubber or the like and which is itself adjustable in height by means of adjusting screws 27 (only one shown) associated with each end of the supporting shaft of roll 16. Roll 16 may be raised or lowered by adjusting screws 27 so as to provide the proper pressure between the rolls 15 and 16. The roll 15 is heated as by heating coil 18 and is provided with a plurality of dies 19.

It will be noted that the dies 19 are placed upon the roll 15 in two series of side-by-side pairs so that as the resin coated paper passes through the rolls 15 and 16, side-by-side impressions 20 and 21 having the sound recording grooves stamped therein by the dies 19 are formed upon the resin coated paper.

A roll 29 of a flat core material 22 of any suitable type, preferably coated with a pressure sensitive adhesive, is positioned as indicated, and as the paper having the resinous coating and the die impressed recording grooves passes the roll 29, it is folded as at 23 so that each pair of die impressions 20 and 21 is placed back to back about the core material 22. The core material 22 may be of any thickness, rigidity, composition or material 3,072,519 Patented Jan. 8 1963 which will provide the structural strength desired in the final product.

Further in the path of the travel in the thus folded assembly, there is provided a die stage including a cutoif die 24 and a punch 25 which punches out the individual records 26 which, as indicated in FIGURE 3, will contain a core, two thicknesses of paper and a pair of die impressed recording grooves 20 and 21.

The success of the above-described method and apparatus is dependent upon the use of a suitable resin, which among other characteristics must be tough and wear resistant, shock proof and water proof. It must be very adhesive to paper when cool and have a rather sharp and'uniform softening point. It must also be capable of reproducing recorded sound well and be free from needle noises. Eastman Chemical Product Companys hot-melt butyrate material designated as MP- 7l-2 and as EAB is a recommended resin. This resin as ofiered to the trade is a compound comprising half-second butyrate as a film former 55% by weight, polyvinyl acetate for adhesion and gloss 5%, a product known as Paraplex G-SO as a plasticizer 25% by weight, a product known as Dow 276V9 for adhesion 14.89% by weight, 0.1% by weight of a suitable stablizer, and as the foregoing has the odor of rancid butter, 0.01% of a suitable masking agent to mask the odor is generally added. The half-second butyrate film former has the characteristic composition:

The polyvinyl acetate has the characteristic composition:

The Paraplex G-50 has the characteristic composition:

The Dow 27 6-V9 adhesion agent has the characteristic composition:

H CH

While there has been described what is at present considered the preferred embodiment of the invention, it will be understood that various changes and alterations may be made therein without departing from the essence of the invention and it is intended to cover herein all such changes and alterations as come within the true scope and spirit of the annexed claim.

I claim: tinuously stamping from the folded strip blanks having A process of making phonograph record blanks comrecording impressions on both sides of a core material. prising the steps of continuously feeding a strip of paper; continuously applying a thin coat of resin to one side References Cited in the file of this Patent of said paper; continuously impressing side-by-side pairs of circles of recording grooves on said side of said paper; 5 UNITED STATES PATENTS continuously folding said paper; continuously feeding 21 1,777,231 Shepherd Sept. 30, 1930 strip of core material between the folds of said paper; 1,937,680 Billings Dec. 5, 1933 said folds being arranged so that each member of each 2,360,973 Pcdersen Oct. 24, 1944 pair of circles of grooves is in back to back relation 10 2,528,611 Saffady Nov. 7, 1950 to the other member about said core material; and con- 2,529,083 Keefe Nov. 7, 1950

US3072519A 1958-08-29 1958-08-29 Method of making phonograph record blanks from composite material Expired - Lifetime US3072519A (en)

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535182A (en) * 1966-11-16 1970-10-20 Intersound Ltd Foil-shaped sound record and method of making same
US3547724A (en) * 1967-02-07 1970-12-15 Rogers Corp Method of and apparatus for producing printed circuits
US3747390A (en) * 1970-11-03 1973-07-24 Teldec Telefunken Decca Method for stamping modulated grooves into information carriers
US3874836A (en) * 1974-01-10 1975-04-01 Education Eng Associates Record press for duplicating pre-recorded records
US3945790A (en) * 1972-12-08 1976-03-23 Thomson-Csf Pressing device for manufacturing of storage substrates
US4032610A (en) * 1972-02-23 1977-06-28 Decca Limited Manufacture of contoured records
US4124672A (en) * 1973-10-15 1978-11-07 Mca Disco-Vision, Inc. Replication utilizing a casting process
US4182020A (en) * 1977-01-03 1980-01-08 Fairchild Camera And Instrument Corporation Method of manufacturing a battery cover for placement in an opening in a battery container
US4315878A (en) * 1980-01-14 1982-02-16 H. B. Fuller Company Manufacture of blanks for recording discs utilizing coextrusion and blanks and records made thereby
US4599125A (en) * 1984-08-03 1986-07-08 Buck Byron L Method and system for forming sheet material into apertured shapes
EP0355925A1 (en) * 1988-08-23 1990-02-28 Nagron Precision Tooling B.V. A method of making a carrier with optically readable, digitable information
EP0387037A2 (en) * 1989-03-10 1990-09-12 Canon Kabushiki Kaisha Process for preparing optical recording medium using a forming roll for a substrate
EP0395395A2 (en) * 1989-04-26 1990-10-31 Canon Kabushiki Kaisha Roll stamper for molding substrate used for optical recording medium, process for preparing same, and process for preparing optical recording medium making use of it
US5173313A (en) * 1990-02-22 1992-12-22 Canon Kabushiki Kaisha Roll-stamper for forming substrate of information-recording medium
US5281371A (en) * 1990-11-16 1994-01-25 Canon Kabushiki Kaisha Method and apparatus for forming substrate sheet for optical recording medium
US5320514A (en) * 1991-10-22 1994-06-14 Canon Kabushiki Kaisha Roll stamper, and apparatus and process for manufacturing substrate sheet for information recording mediums by using the same
US5324188A (en) * 1989-12-19 1994-06-28 Canon Kabushiki Kaisha Roller stamper for molding a substrate sheet to become an information recording medium
US5368789A (en) * 1990-09-28 1994-11-29 Canon Kabushiki Kaisha Method for forming substrate sheet for optical recording medium
US5383834A (en) * 1991-06-14 1995-01-24 Canon Kabushiki Kaisha Roll stamper for forming a base for information recording medium
US5480596A (en) * 1989-07-12 1996-01-02 Canon Kabushiki Kaisha Optical recording medium substrate sheet producing apparatus having roll stamper with elastomer layer of predetermined hardness
US5732818A (en) * 1996-03-20 1998-03-31 R.R. Donnelley & Sons Company Compact disc package
US5852915A (en) * 1996-09-26 1998-12-29 R. R. Donnelley & Sons Company Method of making compact disc product
US20030006535A1 (en) * 2001-06-26 2003-01-09 Michael Hennessey Method and apparatus for forming microstructures on polymeric substrates
US20030117735A1 (en) * 2001-12-20 2003-06-26 Fuji Photo Film Co., Ltd. Method of magnetic transfer to flexible medium
US20030212201A1 (en) * 2000-02-17 2003-11-13 John Hazen Polyester tackifier and adhesive composition
US20070014886A1 (en) * 2005-02-02 2007-01-18 Michael Hennessey Method and apparatus for forming microstructures on polymeric substrates
US20080299247A1 (en) * 2007-05-31 2008-12-04 Masahiko Ogino Fine Pattern Mold and Method for Producing the Same
US20120032371A1 (en) * 2010-07-22 2012-02-09 Tapco International Corporation System and method for manufacturing a rough textured molded plastic siding product

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1777231A (en) * 1928-07-02 1930-09-30 William A Shepard Pad-forming machine
US1937680A (en) * 1929-11-06 1933-12-05 Little Inc A Moldable material
US2360973A (en) * 1943-03-26 1944-10-24 Hayes N Pedersen Manufacture of toy cards
US2528611A (en) * 1947-03-18 1950-11-07 Vogue Recordings Inc Method of making illustrated phonograph records
US2529083A (en) * 1946-07-09 1950-11-07 Lincoln M Keefe Apparatus for making records

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1777231A (en) * 1928-07-02 1930-09-30 William A Shepard Pad-forming machine
US1937680A (en) * 1929-11-06 1933-12-05 Little Inc A Moldable material
US2360973A (en) * 1943-03-26 1944-10-24 Hayes N Pedersen Manufacture of toy cards
US2529083A (en) * 1946-07-09 1950-11-07 Lincoln M Keefe Apparatus for making records
US2528611A (en) * 1947-03-18 1950-11-07 Vogue Recordings Inc Method of making illustrated phonograph records

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535182A (en) * 1966-11-16 1970-10-20 Intersound Ltd Foil-shaped sound record and method of making same
US3547724A (en) * 1967-02-07 1970-12-15 Rogers Corp Method of and apparatus for producing printed circuits
US3747390A (en) * 1970-11-03 1973-07-24 Teldec Telefunken Decca Method for stamping modulated grooves into information carriers
US4032610A (en) * 1972-02-23 1977-06-28 Decca Limited Manufacture of contoured records
US3945790A (en) * 1972-12-08 1976-03-23 Thomson-Csf Pressing device for manufacturing of storage substrates
US4124672A (en) * 1973-10-15 1978-11-07 Mca Disco-Vision, Inc. Replication utilizing a casting process
US3874836A (en) * 1974-01-10 1975-04-01 Education Eng Associates Record press for duplicating pre-recorded records
US4182020A (en) * 1977-01-03 1980-01-08 Fairchild Camera And Instrument Corporation Method of manufacturing a battery cover for placement in an opening in a battery container
US4315878A (en) * 1980-01-14 1982-02-16 H. B. Fuller Company Manufacture of blanks for recording discs utilizing coextrusion and blanks and records made thereby
US4599125A (en) * 1984-08-03 1986-07-08 Buck Byron L Method and system for forming sheet material into apertured shapes
EP0355925A1 (en) * 1988-08-23 1990-02-28 Nagron Precision Tooling B.V. A method of making a carrier with optically readable, digitable information
EP0387037A2 (en) * 1989-03-10 1990-09-12 Canon Kabushiki Kaisha Process for preparing optical recording medium using a forming roll for a substrate
EP0387037A3 (en) * 1989-03-10 1991-06-12 Canon Kabushiki Kaisha Process for preparing optical recording medium using a forming roll for a substrate
EP0395395A2 (en) * 1989-04-26 1990-10-31 Canon Kabushiki Kaisha Roll stamper for molding substrate used for optical recording medium, process for preparing same, and process for preparing optical recording medium making use of it
EP0395395A3 (en) * 1989-04-26 1991-06-05 Canon Kabushiki Kaisha Roll stamper for molding substrate used for optical recording medium, process for preparing same, and process for preparing optical recording medium making use of it
US5310333A (en) * 1989-04-26 1994-05-10 Canon Kabushiki Kaisha Roll stamper for molding substrate used for optical recording medium
US5480596A (en) * 1989-07-12 1996-01-02 Canon Kabushiki Kaisha Optical recording medium substrate sheet producing apparatus having roll stamper with elastomer layer of predetermined hardness
US5516469A (en) * 1989-12-19 1996-05-14 Canon Kabushiki Kaisha Process for producing substrate sheet for information recording mediums
US5324188A (en) * 1989-12-19 1994-06-28 Canon Kabushiki Kaisha Roller stamper for molding a substrate sheet to become an information recording medium
US5173313A (en) * 1990-02-22 1992-12-22 Canon Kabushiki Kaisha Roll-stamper for forming substrate of information-recording medium
US5368789A (en) * 1990-09-28 1994-11-29 Canon Kabushiki Kaisha Method for forming substrate sheet for optical recording medium
US5281371A (en) * 1990-11-16 1994-01-25 Canon Kabushiki Kaisha Method and apparatus for forming substrate sheet for optical recording medium
US5383834A (en) * 1991-06-14 1995-01-24 Canon Kabushiki Kaisha Roll stamper for forming a base for information recording medium
US5456866A (en) * 1991-10-22 1995-10-10 Canon Kabushiki Kaisha Process for manufacturing a substrate sheet for information recording mediums
US5320514A (en) * 1991-10-22 1994-06-14 Canon Kabushiki Kaisha Roll stamper, and apparatus and process for manufacturing substrate sheet for information recording mediums by using the same
US5732818A (en) * 1996-03-20 1998-03-31 R.R. Donnelley & Sons Company Compact disc package
US5852915A (en) * 1996-09-26 1998-12-29 R. R. Donnelley & Sons Company Method of making compact disc product
US6989413B2 (en) * 2000-02-17 2006-01-24 Akzo Nobel N.V. Polyester tackifier and adhesive composition
US20030212201A1 (en) * 2000-02-17 2003-11-13 John Hazen Polyester tackifier and adhesive composition
US20030006535A1 (en) * 2001-06-26 2003-01-09 Michael Hennessey Method and apparatus for forming microstructures on polymeric substrates
US7144241B2 (en) * 2001-06-26 2006-12-05 Energy Conversion Devices, Inc. Method and apparatus for forming microstructures on polymeric substrates
US20050173071A1 (en) * 2001-06-26 2005-08-11 Michael Hennessey Method and apparatus for forming microstructures on polymeric substrates
US20030117735A1 (en) * 2001-12-20 2003-06-26 Fuji Photo Film Co., Ltd. Method of magnetic transfer to flexible medium
US7187510B2 (en) * 2001-12-20 2007-03-06 Fuji Photo Film Co., Ltd. Method of magnetic transfer to flexible medium
US20070014886A1 (en) * 2005-02-02 2007-01-18 Michael Hennessey Method and apparatus for forming microstructures on polymeric substrates
US20080299247A1 (en) * 2007-05-31 2008-12-04 Masahiko Ogino Fine Pattern Mold and Method for Producing the Same
US8083515B2 (en) * 2007-05-31 2011-12-27 Hitachi Industrial Equipment Systems, Co., Ltd. Fine pattern mold
US8387255B2 (en) 2007-05-31 2013-03-05 Hitachi Industrial Equipment Systems Co., Ltd. Fine pattern mold
US20120032371A1 (en) * 2010-07-22 2012-02-09 Tapco International Corporation System and method for manufacturing a rough textured molded plastic siding product
US8721318B2 (en) * 2010-07-22 2014-05-13 Tapco International Corporation System for manufacturing a rough textured molded plastic siding product

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