US3241783A - Flanged spool for tape record carriers - Google Patents

Flanged spool for tape record carriers Download PDF

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Publication number
US3241783A
US3241783A US155440A US15544061A US3241783A US 3241783 A US3241783 A US 3241783A US 155440 A US155440 A US 155440A US 15544061 A US15544061 A US 15544061A US 3241783 A US3241783 A US 3241783A
Authority
US
United States
Prior art keywords
spool
flange
tape
recesses
core
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 - Lifetime
Application number
US155440A
Other languages
English (en)
Inventor
Laa Friedrich
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3241783A publication Critical patent/US3241783A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/28—Arrangements for positively securing ends of material
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/60—Guiding record carrier
    • G11B15/66—Threading; Loading; Automatic self-loading

Definitions

  • the invention relates to a flanged spool for a tapeshaped record carrier, in which the flanges comprise recesses which are cut through the flanges at right angles and extend from the edges of the flanges into the spool core at an oblique angle.
  • the extension gets easily entangled at the sides of the recesses before it leaves these recesses and jerky strains occur at the tape which may result in breakages of the tape.
  • the extension is jammed and operation of the recorder is entirely disturbed in this manner.
  • the side of the recess from the spool core to the edge of the flange co-operating with the tape extension on winding is varied substantially according to an involute.
  • an entirely free travel which is not disturbed by the edges of the recesses is ensured for the extension leaving the core in a tangential direction.
  • the determination of the variation of this side of the recesses may be effected, for example, on the basis of the average obliqueness of the side of the recesses as well as on the proportions of the spool core and the extension which will be explained below.
  • FIG. 1 of the drawing illustrating the subject invention is an enlarged, partial view of the spool shown in FIG. 2.
  • a tape leader is also shown for purposes of description.
  • PEG. 2 is a full view of the spool omitting the leader.
  • the side flanges F attached to a core K, are recessed at D for receiving a cylindrical tape leader or attachment A.
  • the leader A is drawn toward the center of the spool by sliding on the surface iii of the side flanges when the spool is rotated in a clockwise or take-up direction.
  • the involute shape of surface 10 (which is leading the leader A) allows the leader to be freely discharged from the recess without obstruction as indicated by the phantom lines of FIG. 1.
  • the spool is rotated in the unwinding direction when the tape attached to the leader is pulled in the direction T
  • the involute shape of surface 10 defining part of the recesses in each flange of the spool is somewhat unfavorable for drawing the leader to the core of spool during takeup, however, the involute shape of the surface it) is most necessary for high speed unwinding of the spool without breaking the tape when the leader is ejected from the spool recess.
  • the take-up function of the surface 10 is improved by increasing the radius of the flange somewhat to provide a projection V.
  • a spool for tape recorders comprising a core memher having opposed side flanges attached thereto, a pair of non-parallel involute surfaces in each said flange diverging outwardly from said core to the periphery of each said flange, said surfaces defining oblique co-axial recesses in each said flange whereby a film extension is freely ejected from said recesses upon rotation of said spool in a given direction.
  • a spool for tape recorders comprising a core member having opposed side flanges attached thereto, a pair of non-parallel surfaces in each said flange diverging outwardly from said core to the periphery of each said flange, for defining oblique coaxial recesses in each said flange, the surface in each said flange leading during unwinding rotation of said spool defining an involute curve whereby a film extension is freely ejected from said recesses during unwinding rotation of said spool.
  • a spool for tape recorders comprising a core member having opposed side flanges attached thereto, a pair of non-parallel curvilinear surfaces in each said flange diverging outwardly to the periphery of each said flange, said surfaces defining oblique coaxial recesses in each said flange, the surface of said recess leading during unwinding rotation of said spool defining an involute curve and the surface of said recess trailing during unwinding rotation of said spool being displaced in the direction opposite the direction of rotation of said spool during unwinda ing a distance greater than the distance defined by an involute trailing surface of said recess, and a protrusion extending radially outwardly of said flange adjacent said leading surface.
  • a spool for tape recorders comprising a core member having opposed side flanges attached thereto, a pair of non-parallel surfaces in each said flange diverging outwardly from said core to the periphery of each said flange, the surface in each said flange leading during unwinding rotation of said spool defining an involute curve over a substantial portion of its length, said portion extending outwardly from said core in the direction of the periphery of said flanges, said surfaces defining oblique coaxial recesses in each said flange whereby a film extension trail- 4- References Cited by the Examiner UNITED STATES PATENTS MERVIN STEIN, Primary Examiner.
  • said spool is freely ejected from said recesses.

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  • Storage Of Web-Like Or Filamentary Materials (AREA)
US155440A 1960-12-02 1961-11-28 Flanged spool for tape record carriers Expired - Lifetime US3241783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT901860A AT244079B (de) 1960-12-02 1960-12-02 Flanschspule für einen bandförmigen Aufzeichnungsträger

Publications (1)

Publication Number Publication Date
US3241783A true US3241783A (en) 1966-03-22

Family

ID=3610475

Family Applications (1)

Application Number Title Priority Date Filing Date
US155440A Expired - Lifetime US3241783A (en) 1960-12-02 1961-11-28 Flanged spool for tape record carriers

Country Status (7)

Country Link
US (1) US3241783A (enrdf_load_stackoverflow)
AT (1) AT244079B (enrdf_load_stackoverflow)
CH (1) CH396438A (enrdf_load_stackoverflow)
DE (1) DE1919351U (enrdf_load_stackoverflow)
ES (1) ES272572A1 (enrdf_load_stackoverflow)
GB (1) GB1006371A (enrdf_load_stackoverflow)
SE (1) SE307681B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935939A (en) * 1973-02-23 1976-02-03 Olympia Werke Ag Automatic threading of a typing ribbon
US6123286A (en) * 1998-12-16 2000-09-26 Kemet Corporation Apparatus for winding a carrier tape

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US540786A (en) * 1895-06-11 Attaching shades to rollers
US1871234A (en) * 1929-01-16 1932-08-09 Kinatome Patents Corp Container for films and means for handling the same
DE706182C (de) * 1939-05-07 1941-05-20 Johannes Bockemuehl Vorrichtung zur Sicherung des einwaertigen Filmbandendes gegen Abreissen vom Streifengut waehrend des Abwicklungsvorganges
US2366147A (en) * 1940-05-31 1944-12-26 A L Glasmann Typewriter reel
US3090574A (en) * 1959-05-18 1963-05-21 Minnesota Mining & Mfg Magnetic tape magazine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US540786A (en) * 1895-06-11 Attaching shades to rollers
US1871234A (en) * 1929-01-16 1932-08-09 Kinatome Patents Corp Container for films and means for handling the same
DE706182C (de) * 1939-05-07 1941-05-20 Johannes Bockemuehl Vorrichtung zur Sicherung des einwaertigen Filmbandendes gegen Abreissen vom Streifengut waehrend des Abwicklungsvorganges
US2366147A (en) * 1940-05-31 1944-12-26 A L Glasmann Typewriter reel
US3090574A (en) * 1959-05-18 1963-05-21 Minnesota Mining & Mfg Magnetic tape magazine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935939A (en) * 1973-02-23 1976-02-03 Olympia Werke Ag Automatic threading of a typing ribbon
US6123286A (en) * 1998-12-16 2000-09-26 Kemet Corporation Apparatus for winding a carrier tape

Also Published As

Publication number Publication date
AT244079B (de) 1965-12-10
ES272572A1 (es) 1962-03-01
GB1006371A (en) 1965-09-29
SE307681B (enrdf_load_stackoverflow) 1969-01-13
CH396438A (de) 1965-07-31
DE1919351U (de) 1965-07-08

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