US3591102A - Self-catching spool for tapelike record carriers - Google Patents
Self-catching spool for tapelike record carriers Download PDFInfo
- Publication number
- US3591102A US3591102A US839854A US3591102DA US3591102A US 3591102 A US3591102 A US 3591102A US 839854 A US839854 A US 839854A US 3591102D A US3591102D A US 3591102DA US 3591102 A US3591102 A US 3591102A
- Authority
- US
- United States
- Prior art keywords
- spool
- sectors
- flange
- hub ring
- spring elements
- 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
Links
- 239000000969 carrier Substances 0.000 title abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 101100394230 Caenorhabditis elegans ham-1 gene Proteins 0.000 description 1
- 101100045395 Mus musculus Tap1 gene Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/32—Details specially adapted for motion-picture projection
- G03B21/321—Holders for films, e.g. reels, cassettes, spindles
- G03B21/326—Means for fixing the film on the axis of a reel or spindle
-
- 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
- G11B15/67—Threading; Loading; Automatic self-loading by extracting end of record carrier from container or spool
- G11B15/674—Threading or attaching end of record carrier on or to single reel
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/037—Single reels or spools
Definitions
- a flanged spool of the present invention is useful for winding and reeling tapelike record carriers wherein during rotation the record carrier, for example a narrow motion picture film, is automatically gripped when it is inserted between the flanges of the spool.
- Spools of this kind are already known to the prior art in two fundamentally different forms.
- spools which carry on their hub a ring that is usually rotatable and which grips into the perforations of the approaching film to catch the latter
- spools which carry flat bandlike springs on the inner side of the flange between which the approaching film is gripped and held.
- the film of the second system is subjected to a lateral pressure in such a manner that there is no danger of the film being torn at the perforations.
- the purpose of the present invention is to technically perfect this second system.
- Such spools in their present form have the disadvantage of being difficult to manufacture.
- the spools which are usually made of synthetic plastic, are formed of two similar halves which are joined at their hubs.
- the production of such a spool requires two injection operations and one adhering operation which necessitates too many manipulations for such a simple product.
- the present invention also eliminates the last-mentioned difficulty of the prior art by forming the axial slit in the hub ring in a simple manner during the fonnation of the spool.
- FIG. 1 is a perspective view-of the spool
- FIG. 2 is an enlarged fragmentary side view of the flange sectors
- FIG. 3 is a radial section of the spool.
- the spool is shown with a middle hub 9 and a hub ring 7.
- the hub ring 7 has three flange sectors 1, 2 and 3 on one side and three other flange sectors 4, 5 and 6 on the other side.
- the flange sectors 1 to 6 have catching springs la, lb to 6a, 6b respectively associated therewith.
- An axial groove 8 extends through the hub ring 7 to the depth of the flange sector 4. Slots 7a are provided in the hub ring 7 at the free ends of the catching springs la, lb to 6a, 6b.
- one side of the spool is provided with three flange sectors 1, 2 and 3 whose radial center lines are spaced [20 from one another.
- the three flange sectors 4, 5 and 6 are of the same construction but are positioned opposite the vacant spaces between the sectors of the first side.
- Each flange sector is slitted radially along its two outer edges and in those regions is severed from the hub ring 7 in such a manner that each sector is provided with two inwardly bent catching springs, as shown most clearly at sector 1 which is provided with catching springs la, 1b.
- the hub ring 7 is also provided with slots 7a into which the free ends of the spring elements extend, since these ends were cut free from the hub ring at the bottom of the slot. The ends of the spring elements will therefore extend into the interior of each slot, inside the periphery of the hub ring.
- FIG. 2 clearly shows that the outer edges of neighboringv sectors are in circumferential alignment with each other. With this arrangement of the sectors, adependable catching of the film is assured, and it is also possible to produce the spool by a simple injection molding process. The process proceeds with a separation of the mold sections from one another, and in a manner which also permits formation of the axial groove 8 in the hub ring 7 which could not be formed in the spools of the prior art constructions.
- FIG. 3 shows a transverse radial section through the hub of the spool and perpendicular to the film.
- the middle hub 9 is for receiving the end of the projector shaft and it carries radially projecting walls of equal thickness so as to ensure uniform contraction of the material.
- the flange sectors of l to 6, the hub ring 7, and the middle hub 9 have the same wall thickness.
- a self-catching unitary spool for a record carrier strip comprising a hub ring (7) and two spool flanges on the top and bottom of said hub ring, each flange defining an equal number of sectors (1-3 and 4-6) with each sector being positioned opposite vacant spaces between the flange sectors of the opposite flange, and radial slits in the lateral margins of each sector which are cut free at said hub ring from said slit to the outer edge of said sector to define leaflike spring elements (la, lb-6a, 6b) projecting inwardly from said sectors, the outer edges of said spring elements of two flange sectors on opposite sides of the spool being aligned in the same axial direction whereby said spring elements are offset from each other.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
Abstract
A spool for tapelike record carriers which automatically grips the record carrier strip as it is inserted between the flanges of the spool.
Description
United States Patent [72] Inventor Heinz Keiner Oberndorf. Germany 211 App]. No 839,854
[22] Filed July 8, 1969 [45] Patented July 6, 1971 [73] Assignee Ernst Leitz, Gmbfl Wetzhr, Germany [32] Priority July 15, 1968 [33] Germany [54] SELF-CATCHING SPOOL FOR TAPELIKE RECORD CARRIERS 1 Claim, 3 Drm ving Figs. [52] U.S. Cl 242/74 [51] lnt. Cl. 1365!! 75/28 [50] Field of Search 242/74, 74.1, 74.2, 71.8
I 56] References Cited UNITED STATES PATENTS 3,064,917 1 1/1962 Roberts et a1 242/71.8 A 3,323,746 6/1967 Mouissie 242/74.2 FOREIGN PATENTS 746,720 3/1956 Great Britain 242/74.l
Pn'mary Examiner-George F. Mautz Assistant Examiner-Gregory A. Walters Attomey-Krafft and Wells ABSTRACT: A spool for tapelike record carriers which automatically grips the record carrier stripas it is inserted between the flangesof the spool.
PATENTH] JUL 5 1m Ill/[1 INVENTOR sv- Ham 1 Kenny WMJJ/QZZ SELF-CATCI'IING SPOOL FOR TAPELIKE RECORD CARRIERS BACKGROUND OF THE INVENTION The field of the invention is winding and reeling and the invention is particularly concerned with spools with flanges.
A flanged spool of the present invention is useful for winding and reeling tapelike record carriers wherein during rotation the record carrier, for example a narrow motion picture film, is automatically gripped when it is inserted between the flanges of the spool.
Spools of this kind are already known to the prior art in two fundamentally different forms. On the one hand spools are known which carry on their hub a ring that is usually rotatable and which grips into the perforations of the approaching film to catch the latter, and on the other hand spools are known which carry flat bandlike springs on the inner side of the flange between which the approaching film is gripped and held. In contrast to the first-mentioned system, the film of the second system is subjected to a lateral pressure in such a manner that there is no danger of the film being torn at the perforations. The purpose of the present invention is to technically perfect this second system. Such spools in their present form have the disadvantage of being difficult to manufacture. The spools, which are usually made of synthetic plastic, are formed of two similar halves which are joined at their hubs. The production of such a spool requires two injection operations and one adhering operation which necessitates too many manipulations for such a simple product.
Another serious disadvantage of this prior art system is that the spools do not have in their hub rings any slit in the axial direction into which the film could be threaded and in which it could be clamped tight. Such spools are actually suitable for automatically gripping only and can be used only on a projector which is equipped with a corresponding film receiving device. In other projectors where the film must be fastened manually, such a spool cannot be used at all.
SUMMARY OF THE INVENTION Having in mind the limitations of the prior art, it is an object of the present invention to avoid these limitations by having the two flanges of the spool consist of equal numbers of spaced apart flange sectors, the sectors of each. flange being staggered with the intervals between flanges of the other sector, and whose radial lateral borders are slitted outwardly from the hub ring and cut free at the latter to provide spring elements. To ensure proper functioning it is advantageous to provide axial grooves in the periphery of the hub under the ends of the spring elements with the free ends thereof projecting into the grooves. This prevents the initial turns of the film from being pushedunder the free ends of the spring elements I by the lateral pressure of the elements.
The subdivision of the spool flanges into sectors, which at one side of the spool are opposite the intermediate vacant spaces at the other side, makes it possible to produce the spools by one manufacturing process and permit them to be sold as soon as they are taken from the injection molding machine. The second injection molding step of the prior art and also the adhering step are completely avoided which means a saving of at least half of the cost of the manufacture.
The present invention also eliminates the last-mentioned difficulty of the prior art by forming the axial slit in the hub ring in a simple manner during the fonnation of the spool.
The fundamental requirement for catching the film between two leaf springs acting laterally from opposite sides upon the film is that these two springs should be opposite each other in the axial direction. It has however been found that the spools still function satisfactorily with the two spring elements slightly offset from each other while still remaining in the same line of movement of the film. That will permit the use of an injection mold of simple construction for the production of the spool by a single molding step. A further lateral displacement of the spring elements relative to each other is also possible,
although with plainly less satisfactory carrying effect. When they are displaced laterally more than a certain amount, they no longer catch the film satisfactorily.
BRIEF DESCRIPTION OF THE DRAWING The present invention may best be explained by reference to the drawing which illustrates embodiments of the concept of the present invention wherein:
FIG. 1 is a perspective view-of the spool;
FIG. 2 is an enlarged fragmentary side view of the flange sectors; and
FIG. 3 is a radial section of the spool.
With particular reference to FIG. 1, the spool is shown with a middle hub 9 and a hub ring 7. The hub ring 7 has three flange sectors 1, 2 and 3 on one side and three other flange sectors 4, 5 and 6 on the other side.
The flange sectors 1 to 6 have catching springs la, lb to 6a, 6b respectively associated therewith.
An axial groove 8 extends through the hub ring 7 to the depth of the flange sector 4. Slots 7a are provided in the hub ring 7 at the free ends of the catching springs la, lb to 6a, 6b.
DESCRIPTION OF THE PREFERRED EMBODIMENTS It can be clearly seen, especially on FIG. 1, that one side of the spool is provided with three flange sectors 1, 2 and 3 whose radial center lines are spaced [20 from one another. On the other side of the spool the three flange sectors 4, 5 and 6 are of the same construction but are positioned opposite the vacant spaces between the sectors of the first side.
Each flange sector is slitted radially along its two outer edges and in those regions is severed from the hub ring 7 in such a manner that each sector is provided with two inwardly bent catching springs, as shown most clearly at sector 1 which is provided with catching springs la, 1b.
The hub ring 7 is also provided with slots 7a into which the free ends of the spring elements extend, since these ends were cut free from the hub ring at the bottom of the slot. The ends of the spring elements will therefore extend into the interior of each slot, inside the periphery of the hub ring.
FIG. 2 clearly shows that the outer edges of neighboringv sectors are in circumferential alignment with each other. With this arrangement of the sectors, adependable catching of the film is assured, and it is also possible to produce the spool by a simple injection molding process. The process proceeds with a separation of the mold sections from one another, and in a manner which also permits formation of the axial groove 8 in the hub ring 7 which could not be formed in the spools of the prior art constructions.
FIG. 3 shows a transverse radial section through the hub of the spool and perpendicular to the film. The middle hub 9 is for receiving the end of the projector shaft and it carries radially projecting walls of equal thickness so as to ensure uniform contraction of the material. The flange sectors of l to 6, the hub ring 7, and the middle hub 9 have the same wall thickness.
Iclaim:
l. A self-catching unitary spool for a record carrier strip comprising a hub ring (7) and two spool flanges on the top and bottom of said hub ring, each flange defining an equal number of sectors (1-3 and 4-6) with each sector being positioned opposite vacant spaces between the flange sectors of the opposite flange, and radial slits in the lateral margins of each sector which are cut free at said hub ring from said slit to the outer edge of said sector to define leaflike spring elements (la, lb-6a, 6b) projecting inwardly from said sectors, the outer edges of said spring elements of two flange sectors on opposite sides of the spool being aligned in the same axial direction whereby said spring elements are offset from each other.
Claims (1)
1. A self-catching unitary spool for a record carrier strip comprising a hub ring (7) and two spool flanges on the top and bottom of said hub ring, each flange defining an equal number of sectors (1-3 And 4-6) with each sector being positioned opposite vacant spaces between the flange sectors of the opposite flange, and radial slits in the lateral margins of each sector which are cut free at said hub ring from said slit to the outer edge of said sector to define leaflike spring elements (1a, 1b- 6a, 6b) projecting inwardly from said sectors, the outer edges of said spring elements of two flange sectors on opposite sides of the spool being aligned in the same axial direction whereby said spring elements are offset from each other.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681772869 DE1772869A1 (en) | 1968-07-15 | 1968-07-15 | Self-locking reel for tape-shaped recording media |
Publications (1)
Publication Number | Publication Date |
---|---|
US3591102A true US3591102A (en) | 1971-07-06 |
Family
ID=5701435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US839854A Expired - Lifetime US3591102A (en) | 1968-07-15 | 1969-07-08 | Self-catching spool for tapelike record carriers |
Country Status (5)
Country | Link |
---|---|
US (1) | US3591102A (en) |
AT (1) | AT291764B (en) |
DE (1) | DE1772869A1 (en) |
FR (1) | FR2012958A1 (en) |
GB (1) | GB1211967A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3677495A (en) * | 1971-03-05 | 1972-07-18 | Ampex | Tape retaining reel cartridge |
US3768750A (en) * | 1971-12-30 | 1973-10-30 | Paulman Inc | Automatic threading film reel |
US3837599A (en) * | 1971-04-22 | 1974-09-24 | Polygon Concepts Inc | Cassette |
JPS5511650U (en) * | 1978-07-06 | 1980-01-25 | ||
US5495998A (en) * | 1993-02-09 | 1996-03-05 | Fuji Photo Film Co., Ltd. | Tape reel structure for magnetic tape cassette |
US7303569B2 (en) | 2000-10-12 | 2007-12-04 | Cardica, Inc. | Implantable superelastic anastomosis device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2687496B2 (en) * | 1988-10-31 | 1997-12-08 | ソニー株式会社 | Tape reel |
US4993655A (en) * | 1989-11-28 | 1991-02-19 | Shape Inc. | One-piece tape reel |
FR2958260B1 (en) | 2010-04-01 | 2012-11-16 | Matra Mfg & Services | VELO WITH BELT TRANSMISSION AND ITS FRAME |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB746720A (en) * | 1954-05-13 | 1956-03-21 | Hugo Henkels | Reel with holding members for a band wound thereon |
US3064917A (en) * | 1959-08-13 | 1962-11-20 | Dictaphone Corp | Reels |
US3323746A (en) * | 1965-02-18 | 1967-06-06 | Paillard Sa | Automatic end fastener for film spool |
-
1968
- 1968-07-15 DE DE19681772869 patent/DE1772869A1/en active Pending
-
1969
- 1969-07-08 US US839854A patent/US3591102A/en not_active Expired - Lifetime
- 1969-07-08 GB GB34420/69A patent/GB1211967A/en not_active Expired
- 1969-07-09 FR FR6923309A patent/FR2012958A1/fr not_active Withdrawn
- 1969-07-11 AT AT671169A patent/AT291764B/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB746720A (en) * | 1954-05-13 | 1956-03-21 | Hugo Henkels | Reel with holding members for a band wound thereon |
US3064917A (en) * | 1959-08-13 | 1962-11-20 | Dictaphone Corp | Reels |
US3323746A (en) * | 1965-02-18 | 1967-06-06 | Paillard Sa | Automatic end fastener for film spool |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3677495A (en) * | 1971-03-05 | 1972-07-18 | Ampex | Tape retaining reel cartridge |
US3837599A (en) * | 1971-04-22 | 1974-09-24 | Polygon Concepts Inc | Cassette |
US3768750A (en) * | 1971-12-30 | 1973-10-30 | Paulman Inc | Automatic threading film reel |
JPS5511650U (en) * | 1978-07-06 | 1980-01-25 | ||
US5495998A (en) * | 1993-02-09 | 1996-03-05 | Fuji Photo Film Co., Ltd. | Tape reel structure for magnetic tape cassette |
US7303569B2 (en) | 2000-10-12 | 2007-12-04 | Cardica, Inc. | Implantable superelastic anastomosis device |
Also Published As
Publication number | Publication date |
---|---|
FR2012958A1 (en) | 1970-03-27 |
DE1772869A1 (en) | 1971-06-16 |
AT291764B (en) | 1971-07-26 |
GB1211967A (en) | 1970-11-11 |
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