US3906649A - Dimensionally stable film mounting - Google Patents

Dimensionally stable film mounting Download PDF

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Publication number
US3906649A
US3906649A US443881A US44388174A US3906649A US 3906649 A US3906649 A US 3906649A US 443881 A US443881 A US 443881A US 44388174 A US44388174 A US 44388174A US 3906649 A US3906649 A US 3906649A
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US
United States
Prior art keywords
plate
back plate
cover plate
elongated
apertures
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
US443881A
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English (en)
Inventor
Donald W Schaefer
John W Woods
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.)
International Business Machines Corp
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International Business Machines Corp
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Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US443881A priority Critical patent/US3906649A/en
Priority to FR7443630A priority patent/FR2261572B1/fr
Priority to GB487375A priority patent/GB1447344A/en
Application granted granted Critical
Publication of US3906649A publication Critical patent/US3906649A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine

Definitions

  • the film strip is inserted into a slot slightly larger than its thickness and securely fastened at its longitudinal center. Additionally, it is fastened at one longitudinal end of the strip.
  • the assembly eliminates undulations in a film strip which can be caused by differences in expansion properties between the mount and the film.
  • FIG.1 A first figure.
  • the present invention relates to film mountings and more particularly to film mountings usable for transducing systems.
  • An improvement on the Burke et al. apparatus included a small tape reel having a dimension of less than 2 inches X 2 inches cross-section with a length of less than four inches. As technology advances, it is expected that a 1 inch X /2 inch cross-section storage cell may be employed. From the above, it can be seen that dimensionally stable location indications become increasingly more important.
  • Applicants employed various techniques, but not to the success achieved by the present invention. For example, light spring or yieldable fingers held a film strip against a flat plate with the strip anchored at the strip longitudinal center. Because of the friction between the spring fingers and the strip, undulations resulted in the film strip as the temperature and humidity changed. The above arrangement was modified, but to no avail, by adding a spring-loaded bar, plus the spring finger anchoring. Again, perturbations were noticed. The strip was then reinforced by bonding a strip of Mylar in the clamping area. This selection improved the stability to a limited degree.
  • a film strip was stiffened by bending it into an L-shape along one longitudinal end mounting it with light spring fingers. Such approach resulted in a nonmanufacturable structure. Bending the Mylar in L- shape can become expensive. Also, mounting a strip in tension with an anchor or reference point at the longitudinal center was examined. The problem with the latter approach is to provide the correct amount of tension. It appears tension may vary with the temperature and humidity such that the Mylar, under certain conditions, may stretch. In summary, no inexpensive way was found prior to this invention to provide a dimensionally stable, plastic-like, indicating strip mounted on a metallic base for added strength and reliability.
  • a dimensionally stable indicating assembly in accordance with the present invention, includes an elongated back plate of metal, such as aluminum, which exhibits a first dimensional expansion/contraction characteristic with respect to temperature and humidity.
  • Such back plate has a first aperture centrally located its length, and a second aperture adjacent one longitudinal end.
  • An elongated cover plate faces the back plate and is arranged to provide a longitudinal extending slot of given width for receiving an elongated plastic plate-like member having indicating indicia thereon, but exhibiting a second dimensional expansion/contraction characteristic with respect to temperature and humidity.
  • the latter characteristic can be quite different from the first characteristic.
  • a pair of retaining pins extends through the apertures in the cover plate, back plate, and the plastic plate-like member.
  • the central one of the pins precisely locates the plastic member longitudinally; while the second pin, at one longitudinal end of the assembly, orients the plastic plate-like member in a rotational sense, i.e., allows longitudinal expansion. It is preferred that all of the members have substantially the same length.
  • an elongated shim spaces the cover and back plates to form the slot.
  • the assembly is suitably fastened together.
  • the shim has a thickness equal to the given. spacing of the slot.
  • the thickness of the plastic plate-like member is slightly less than the spacing between the plates which form the slots. This allows expansion, but also provides frictional forces on the plastic member.
  • FIG. 1 is a simplified diagrammatic showing of an application of the present invention.
  • FIG. 2 is a simplified diagrammatic elevational view of a preferred embodiment of the present invention.
  • FIG. 3 is a simplified diagrammatic cross-sectional view of the FIG. 2 illustrated embodiment taken in the direction of the arrows along lines 3-3 of FIG. 2.
  • FIG. 1 illustrates such a system in simplified diagrammatiic form wherein a carriage 10 is suitably mounted for travel along a rail 11.
  • Rail lll is precisely mounted on a frame (not shown).
  • a photosensing system (not shown) is carried by carriage-10.
  • location-indicating plate 12 is mounted in juxtaposition to the various storage compartments.
  • Plate 12 contains a plurality of locationindicating indieia l3 yielding an address of the storage compartments with which strip or plate 12 is precisely associated.
  • Plate 12 is mounted in a metallic holder such thatdimensional stability of the total assembly is enhanced for,avoiding undulations in the plate 12 and thence interference with carriage or perturbations in the sensing operation.
  • undulations means a type of wrinkling of plate 12.
  • indicating plate 12 is preferably constructed of a Mylar material. Any plastic-like material having good phototransmissivc and opaquing properties is suitably employed with the present invention. It is desired for strength and stability reasons to mount plate 12 on a metallic U-shaped channel 20, which in turn is precisely secured to a frame (not shown).
  • the outward flange 21 of channel is a back plate for supporting plate-like member 12.
  • Back plate 21 is precisely located with respect tothe travel path of carriage 10.
  • the; Mylar indicating strip has a thickness of approximately 0.007 inch.
  • Plates 22 and 21 are spaced apartslightly greater than that distance; for example, 0.011 inch. This spacing permits strip 12 to expand andcontract without adding substantial frictional engagement between the plate-like member 12 and the supporting plate.2l and 22. Yet, it is sufficiently narrow tomaintainstrip 12 in a transversedirection to relativelyv tight tolerances
  • slot 23 spacing is, determined by longitudinal shim 24 disposed between plates 21 and 22 and securely held to U-shaped channel member 20 by a plurality of screws 25.
  • cover plate 22 may have a longitudinal. shoulder replacing shim 24; or U-shaped channel member 20 may have a corresponding longitudinal extending shoulder.
  • Cover plate 22 has a pair of upwardly opening pinreceiving slots 26 and 27, respectively, for receiving spring-type pins 28 and 29. These pins extend through an aperture in cover plate 22, plate-like member 12, and back plate or flange 21.
  • the longitudinal central aperture of back plate 21, which receives pin 28, is precisely located in the longitudinal dimension for precisely locating plate-like member 12. It should be noted that by selecting the longitudinal center of the strip 12, the cumulative dimensional changes at each longitudinal end are halved. Pin 29 extends through apertures in plates 2l.and 22 to hold strip 12.
  • strip 12 has an elongated slot for allowing longitudinal changes indicated by dashed line 32. By forming slots 26 and 27 in cover plate 22, the precise aperture location is limitedto those in channel 20, thereby reducing cost.
  • the above-described assembly is suitable for accommodating various types of materials in the support apparatus 20., 21, and 22 for supporting the plate-like members from a variety of materials while achieving the results set forth for the specific preferred form of practicing the invention.
  • a plurality of strips 12 would be mounted along rail 11 for identifying address locations of a plurality of storage compartments. All of the members 20, 22, and 12 should have approximately the same longitudinal length, for example, of about 12 inches.
  • a dimensionally stable indicating assembly including in combination:
  • an elongated longitudinally extending back plate member of first material having a first dimensional expansion characteristic and having a first aperture centrally of its length and a second aperture adjacent one longitudinal end;
  • an elongated cover plate member facing said back plate and having one longitudinally extending edge spaced a given distance from said elongated back plate;
  • an elongated plate-like member having sensible indicia and a second dimensional expansion characteristic substantially different from the first dimensional expansion characteristic and a first aperture central thereof and a second aperture adjacent one longitudinal end and having a longitudinal edge portion disposed between said plate members such that said first and second apertures are aligned;
  • an elongated shim means disposed between said plate members along a second longitudinal edge portion opposite to said first longitudinal edge portion, having a thickness equal to said given distance v and having a length about equal to said plate member lengths;
  • said cover plate member apertures being upwardly extending slots
  • said retainers have an enlarged head portion abutting said cover plate member and resilient locking portion engaging said base plate member whereby a spring loading is exerted on said cover plate member at its said apertures.
  • said back plate member is a flange portion of an elongated U-channel having a web of greater transverse extent than width of said flange portion.
  • an elongate cover plate having a width substantially equal to said back plate flange and being securely fastened to said elongate shim member for forming a slot between said back plate flange and said cover plate which has a width slightly greater than the thickness of a member to be received;

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
US443881A 1974-02-19 1974-02-19 Dimensionally stable film mounting Expired - Lifetime US3906649A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US443881A US3906649A (en) 1974-02-19 1974-02-19 Dimensionally stable film mounting
FR7443630A FR2261572B1 (enrdf_load_stackoverflow) 1974-02-19 1974-12-31
GB487375A GB1447344A (en) 1974-02-19 1975-02-05 Information record assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US443881A US3906649A (en) 1974-02-19 1974-02-19 Dimensionally stable film mounting

Publications (1)

Publication Number Publication Date
US3906649A true US3906649A (en) 1975-09-23

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ID=23762548

Family Applications (1)

Application Number Title Priority Date Filing Date
US443881A Expired - Lifetime US3906649A (en) 1974-02-19 1974-02-19 Dimensionally stable film mounting

Country Status (3)

Country Link
US (1) US3906649A (enrdf_load_stackoverflow)
FR (1) FR2261572B1 (enrdf_load_stackoverflow)
GB (1) GB1447344A (enrdf_load_stackoverflow)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1567310A (en) * 1921-04-06 1925-12-29 Frank A Weeks Lantern slide
US2292312A (en) * 1940-06-18 1942-08-04 Eastman Kodak Co Stereoscopic film mount
US2450008A (en) * 1945-06-18 1948-09-28 Standard Telephones Cables Ltd Cooperating card envelope and a card holder with detent retaining means
US2656631A (en) * 1949-05-16 1953-10-27 Cadwell Corp Film mount slide
US2833072A (en) * 1957-05-03 1958-05-06 Gregory William Identification picture assembly for a vehicle identification system
US3422556A (en) * 1966-12-29 1969-01-21 Delbert T Lyons Identification marker

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1567310A (en) * 1921-04-06 1925-12-29 Frank A Weeks Lantern slide
US2292312A (en) * 1940-06-18 1942-08-04 Eastman Kodak Co Stereoscopic film mount
US2450008A (en) * 1945-06-18 1948-09-28 Standard Telephones Cables Ltd Cooperating card envelope and a card holder with detent retaining means
US2656631A (en) * 1949-05-16 1953-10-27 Cadwell Corp Film mount slide
US2833072A (en) * 1957-05-03 1958-05-06 Gregory William Identification picture assembly for a vehicle identification system
US3422556A (en) * 1966-12-29 1969-01-21 Delbert T Lyons Identification marker

Also Published As

Publication number Publication date
FR2261572A1 (enrdf_load_stackoverflow) 1975-09-12
FR2261572B1 (enrdf_load_stackoverflow) 1976-12-31
GB1447344A (en) 1976-08-25

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