US3802615A - Flexible strip threading guide - Google Patents

Flexible strip threading guide Download PDF

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Publication number
US3802615A
US3802615A US00336141A US33614173A US3802615A US 3802615 A US3802615 A US 3802615A US 00336141 A US00336141 A US 00336141A US 33614173 A US33614173 A US 33614173A US 3802615 A US3802615 A US 3802615A
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US
United States
Prior art keywords
guide
slot
threading
flexible strip
strip
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
US00336141A
Inventor
J Bundschuh
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US00336141A priority Critical patent/US3802615A/en
Priority to FR7405331A priority patent/FR2219096B1/fr
Priority to DE2409063A priority patent/DE2409063A1/en
Priority to GB868074A priority patent/GB1456111A/en
Application granted granted Critical
Publication of US3802615A publication Critical patent/US3802615A/en
Priority to HK253/77A priority patent/HK25377A/en
Priority to MY287/77A priority patent/MY7700287A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/32—Arrangements for turning or reversing webs
    • 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
    • G03B1/00—Film strip handling
    • G03B1/56—Threading; Loop forming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4136—Mounting arrangements not otherwise provided for
    • B65H2301/41368—Mounting arrangements not otherwise provided for one or two lateral flanges covering part of or entire web diameter

Definitions

  • ABSTRACT A threading guide for imparting a desired twist to a flexible strip.
  • the threading guide includes aslot for receiving the strip in edgewise orientation only and a guide surface communicating with the slot for deflecting the first edge of the strip to enter the slot through a desired twist angle so that the mere insertion of the flexible strip into the slot will impart the desired twist to the flexible strip only in a desired direction.
  • Threading problems are further complicated if it is necessary to impart a twist to the strip being threaded.
  • the twist usually must take place in one direction only so that a particular orientation of the strip may be maintained.
  • the twist problem in flexible strip transportation was considered in the German Pat. No. 2,024,646 in the name of Agfa-Gevaert A. G., published June 22, 1972, and the British Pat. No. 1,206,043 in the name of the Rank Organization Limited, published Sept. 23, 1970.
  • a guide channel is used to impart a desired twist to a flexible filmstrip.
  • the twist must be accomplished in a specific direction to keep the film perforations and emulsion surface in a particular orientation relative to theirrespective film gate.
  • FIG. 1 is a perspective view of the flexible strip threading guide according to this invention, the threading guide being shown as associated with a motion picture projector having'a horizontally oriented film reel;
  • FIG. 2 is a plan view of the flexible strip threading guide of FIG. 1;
  • FIG. 3 is a side elevational view of the flexible strip threading guide of FIG. 1 showing the first opening thereof;
  • FIG. 4 is a front elevational view of the flexible strip threading guide of FIG. 1 showing the second opening thereof.
  • FIG. 1 shows a flexible strip threading guide 10 mounted, for example, on a horizontal format motion picture projector 12, the projector 12 being shown and described only to the extent necessary for a complete understanding of this inventionJ
  • the projector 12 has mounted thereon a reel 14 having a flexible strip of film 16 of well known type used in amateur motion picture apparatus wound thereon, the film 16 having a series of perforations 18 along one edge thereof.
  • the reel 14 is mounted for rotation on aspindle 20.
  • the threading guide 10 is located on the projector 12 adjacent the reel 14 so as to permit the film 16 to be properly threaded to pass over a guide roller 24 to be directed in a proper orientation into the film gate 22. After proper threading,the film 16 may be withdrawn from the reel 14 and directed through the film gate 22 by a drive mechanism (not shown) not forming part of this invention.
  • the threading guide 10 is formed by a hollow housing having a base 26, a top member 28 and upstanding side walls 30, 32, 34 and 36 interconnecting the base 26 and the top 28. As shown in FIG. 3 the side wall 34 has a first opening 38 located therein which provides for passage of the filmstrip 16 without interfering with the movement of the strip therethrough. Immediately adjacent the opening 38 within the housing of the threading guide 10 there is located a guide roller 40 over which the filmstrip 16 is entrained so as .to be redirected towards a second opening 42 located in the side wall 32 (see FIG. 4). The roller 40 may be a snubber roller to compensate for changes in tension in the filmstrip 16, and further may serve as a trip for an automatic rewind system for the projector 12.
  • the second opening 42 has major dimensional margins 44 and 46 and minor dimensional margins 48 and 50 and generally conforms to the cross-sectional area of the filmstrip 16 being guided.
  • the dimensions of the opening 42 are relatively largely increased so as not to interfere with the movement of the filmstrip through the opening.
  • the major dimensional margins 52 and 54 of the second opening are oriented with respect to the roller 40 at an angle equal to the desired twist to be imparted to the filmstrip l6 and at a vertical height such that filmstrip 16 passing over rollers 40 and 24 will not normally touch the side margins.
  • the desired twist is and therefore the major dimensional margins are rotated relatively through an angle of 90.
  • a slot 52 is formed in the top member 28 and intersects the first opening 38 to provide communication therewith through the top 28.
  • the slot 52 continues to the side wall 32 wherein a slot 54 is formed which connects with the minor dimensional margin 48 of the secnd opening 42.
  • the slot '52 is configured so as to per- -mit.passage of the filmstrip 16 only when it is in an e'dgewise orientation.
  • the slot 54 is configured so as to form a deflection surface for the edge of the film entering the slot 52 to twist the filmstrip through a desired angle.
  • the perforations 18 will necessarily be maintained on the desired edge of the film 16 for .proper feeding into the film gate 22.
  • the configuration of the guide 10 and its opening 42 is such that the film will not contact the opening during normal operation.
  • the threading'guide has a slot for receiving the strip in edgewise orientation only and a deflecting surface communicating with the slot for deflecting the first edge of the strip to enter the slot through a desired twist angle so that the mere insertion of the flexible strip into the threading guide through the slot will impart the desired twist to the strip only in a desired direction. Because of the configuration and location of elements of the guide, the flexible strip will normally have no contact with the guide so as to substantially eliminate the possibility of damage to the strip.
  • a threading guide for facilitating threading of a flexible strip from a first roller guide to a second roller guide, said second roller guide being oriented at an angle with respect to said first roller guide, said threading guide including a guide body having an opening therethrough in a direct line between said first roller and said second roller, said opening being configured so as to permit unrestricted travel of said flexible strip therethrough, a longitudinal threading slot in said guide body extending in a direction generally parallel to the path between said first and second roller guides, said threading slot being configured to receive said flexible strip only when a lateral edge of said strip is in an edgewise orientation with respect thereto, and a deflecting surface between said threading slot and said opening, said deflecting surface being configured to deflect alateral edge of aflexible strip through a desired twist angle whereby a flexible strip threaded into said slot in an edgewise orientation will assume a twist generally conforming to the difference in orientation of said roller guides.
  • a guide for threading a flexible strip into a travel path having a desired twist angle comprising: a body; a longitudinal slot in said body, said slot extending generally in the direction of said desired travel path to establish a threading entrance to said guide for said flexible strip when a lateral edge of said strip is in edgewise orientation with respect thereto; and a deflecting surface communicating with said slot and said desired travel path, said deflecting surface being configured so as to deflect a lateral edge of a flexible strip threaded into said slot through said desired twist angle.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Replacement Of Web Rolls (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

A threading guide for imparting a desired twist to a flexible strip. The threading guide includes a slot for receiving the strip in edgewise orientation only and a guide surface communicating with the slot for deflecting the first edge of the strip to enter the slot through a desired twist angle so that the mere insertion of the flexible strip into the slot will impart the desired twist to the flexible strip only in a desired direction.

Description

United States Patent 11 1 Bundschuh 1 FLEXIBLE STRIP THREADING GUIDE [.75] Inventor: John J. Bundschuh, Penfield, NY.
[73] Assignee: Eastman Kodak Company,
Rochester, NY.
[22] Filed: Feb. 26, 1973 [21] Appl. No.: 336,141
52 u.s.c1...; ..226/91,226/197,242/76, 352/157 51 1111. c1 ..B6Sh 23/32 [58] Field of Search 226/196, 197, 91; 242/76, 242/157; 352/157 [56] References Cited UNITED STATES PATENTS 2,250,138 7/1941 Sheperdson 226/196 X Apr. 9, 1974 2,890,619 6/1959 Waller 226/196 ux 3,094,293 6/1963 Schultz 226/196 x 3,548,783 12/1970 Knapp 226/197 x 3,707,254 12/1972 Scott 226/197 Primary ExaminerRichard A. Schacher 5 7] ABSTRACT A threading guide for imparting a desired twist to a flexible strip. The threading guide includes aslot for receiving the strip in edgewise orientation only and a guide surface communicating with the slot for deflecting the first edge of the strip to enter the slot through a desired twist angle so that the mere insertion of the flexible strip into the slot will impart the desired twist to the flexible strip only in a desired direction.
2 Claims, 4 Drawing Figures FLEXIBLE STRIP TI-IREADING GUIDE BACKGROUND OF THE INVENTION prevent surface damage. While this could most readily be prevented by utilizing controllable manual threading techniques, a typical operator may not have the necessary mechanical dexterity to accomplish such techniques. An example of such a problem area is that concerned' with motion picture projection filmthreading which must be accomplished by even the most uncoordinated. In order to simplify threading of motion picture film, automated threading devices have been developed which closely approximate desired manual threading techniques.
Threading problems are further complicated if it is necessary to impart a twist to the strip being threaded. The twist usually must take place in one direction only so that a particular orientation of the strip may be maintained. The twist problem in flexible strip transportation was considered in the German Pat. No. 2,024,646 in the name of Agfa-Gevaert A. G., published June 22, 1972, and the British Pat. No. 1,206,043 in the name of the Rank Organization Limited, published Sept. 23, 1970. In each of the identified publications a guide channel is used to impart a desired twist to a flexible filmstrip. The twist must be accomplished in a specific direction to keep the film perforations and emulsion surface in a particular orientation relative to theirrespective film gate. These guide channels provided inthe noted publications, while accomplishing desired twisting, have considerable surface contact with respective filmstrips. The amount of contact with the surface of the filmstrip presents problems with regard to drag on the strip and possible scratching of the film surfaces. These problems are accentuated due to the fact that the filmstrip is fed endwise into the cited channels which results in contact with the film while the film is moving longitudinally in the channels.
SUMMARY OF THE INVENTION In view of the above, it is a principle object of this invention to provide a threading guide for imparting a desired twist in a particular direction to a flexible strip,
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the flexible strip threading guide according to this invention, the threading guide being shown as associated with a motion picture projector having'a horizontally oriented film reel;
FIG. 2 is a plan view of the flexible strip threading guide of FIG. 1;
FIG. 3 is a side elevational view of the flexible strip threading guide of FIG. 1 showing the first opening thereof; and
FIG. 4 is a front elevational view of the flexible strip threading guide of FIG. 1 showing the second opening thereof.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings, FIG. 1 shows a flexible strip threading guide 10 mounted, for example, on a horizontal format motion picture projector 12, the projector 12 being shown and described only to the extent necessary for a complete understanding of this inventionJThe projector 12 has mounted thereon a reel 14 having a flexible strip of film 16 of well known type used in amateur motion picture apparatus wound thereon, the film 16 having a series of perforations 18 along one edge thereof. The reel 14 is mounted for rotation on aspindle 20. The threading guide 10 is located on the projector 12 adjacent the reel 14 so as to permit the film 16 to be properly threaded to pass over a guide roller 24 to be directed in a proper orientation into the film gate 22. After proper threading,the film 16 may be withdrawn from the reel 14 and directed through the film gate 22 by a drive mechanism (not shown) not forming part of this invention.
The threading guide 10 is formed by a hollow housing having a base 26, a top member 28 and upstanding side walls 30, 32, 34 and 36 interconnecting the base 26 and the top 28. As shown in FIG. 3 the side wall 34 has a first opening 38 located therein which provides for passage of the filmstrip 16 without interfering with the movement of the strip therethrough. Immediately adjacent the opening 38 within the housing of the threading guide 10 there is located a guide roller 40 over which the filmstrip 16 is entrained so as .to be redirected towards a second opening 42 located in the side wall 32 (see FIG. 4). The roller 40 may be a snubber roller to compensate for changes in tension in the filmstrip 16, and further may serve as a trip for an automatic rewind system for the projector 12.
The second opening 42 has major dimensional margins 44 and 46 and minor dimensional margins 48 and 50 and generally conforms to the cross-sectional area of the filmstrip 16 being guided. The dimensions of the opening 42, however, are relatively largely increased so as not to interfere with the movement of the filmstrip through the opening. The major dimensional margins 52 and 54 of the second opening are oriented with respect to the roller 40 at an angle equal to the desired twist to be imparted to the filmstrip l6 and at a vertical height such that filmstrip 16 passing over rollers 40 and 24 will not normally touch the side margins. In the instant embodiment, the desired twist is and therefore the major dimensional margins are rotated relatively through an angle of 90.
A slot 52 is formed in the top member 28 and intersects the first opening 38 to provide communication therewith through the top 28. The slot 52 continues to the side wall 32 wherein a slot 54 is formed which connects with the minor dimensional margin 48 of the secnd opening 42. The slot '52 is configured so as to per- -mit.passage of the filmstrip 16 only when it is in an e'dgewise orientation. The slot 54 is configured so as to form a deflection surface for the edge of the film entering the slot 52 to twist the filmstrip through a desired angle.
With the slots 52 and 54 thus formed, as shown in FIG. 4, when a strip of film 16 is inserted in the slot 52 at one end it may be entrained over the guide roller 40 so as to extend through the first opening 38 into the hollow interior of the threading guide 10. Because of the curvature of the slot 54, as the edge of the filmstrip 16 (not having the perforations 18) enters the slot 54, the film will be twisted until it reaches the desired degree of twist as it enters the opening 42. Due to the particular described configuration of the slots 52 and 54, the twist of the film 16 being threaded can only be accomplished in one desired direction and is no way dependent upon the mechanical skill of the threader. In
this manner the perforations 18 will necessarily be maintained on the desired edge of the film 16 for .proper feeding into the film gate 22. When the film 16 is properly threaded with the aid of the guide so that the film extends over rollers 40 and 24, the configuration of the guide 10 and its opening 42 is such that the film will not contact the opening during normal operation.
From the foregoing, it is readily apparent that there is herein provided a novel threading guide of simple construction for insuring the proper threading of a flexible strip. The threading'guide has a slot for receiving the strip in edgewise orientation only and a deflecting surface communicating with the slot for deflecting the first edge of the strip to enter the slot through a desired twist angle so that the mere insertion of the flexible strip into the threading guide through the slot will impart the desired twist to the strip only in a desired direction. Because of the configuration and location of elements of the guide, the flexible strip will normally have no contact with the guide so as to substantially eliminate the possibility of damage to the strip.
The invention has been described in detail with reference to a preferred embodiment thereof, but it will be understood that variations and modifications can be effected within the spirit and scope of the invention.
I claim:
1. A threading guide for facilitating threading of a flexible strip from a first roller guide to a second roller guide, said second roller guide being oriented at an angle with respect to said first roller guide, said threading guide including a guide body having an opening therethrough in a direct line between said first roller and said second roller, said opening being configured so as to permit unrestricted travel of said flexible strip therethrough, a longitudinal threading slot in said guide body extending in a direction generally parallel to the path between said first and second roller guides, said threading slot being configured to receive said flexible strip only when a lateral edge of said strip is in an edgewise orientation with respect thereto, and a deflecting surface between said threading slot and said opening, said deflecting surface being configured to deflect alateral edge of aflexible strip through a desired twist angle whereby a flexible strip threaded into said slot in an edgewise orientation will assume a twist generally conforming to the difference in orientation of said roller guides. 2. A guide for threading a flexible strip into a travel path having a desired twist angle, said guide comprising: a body; a longitudinal slot in said body, said slot extending generally in the direction of said desired travel path to establish a threading entrance to said guide for said flexible strip when a lateral edge of said strip is in edgewise orientation with respect thereto; and a deflecting surface communicating with said slot and said desired travel path, said deflecting surface being configured so as to deflect a lateral edge of a flexible strip threaded into said slot through said desired twist angle.

Claims (3)

1. A threading guide for facilitating threading of a flexible strip from a first roller guide to a second roller guide, said second roller guide being oriented at an angle with respect to said first roller guide, said threading guide including a guide body having an opening therethrough in a direct line between said first roller and said second roller, said opening being configured so as to permit unrestricted travel of said flexible strip therethrough, a longitudinal threading slot in said guide body extending in a direction generally parallel to the path between said first and second roller guides, said threading slot being configured to receive said flexible strip only when a lateral edge of said strip is in an edgewise orientation with respect thereto, and a deflecting surface between said threading slot and said opening, said deflecting surface being configured to deflect a lateral edge of a flexible strip through a desired twist angle whereby a flexible strip threaded into said slot in an edgewise orientation will assume a twist generally conforming to the difference in orientation of said roller guides.
2. A guide for threading a flexible strip into a travel path having a desired twist angle, said guide comprising: a body; a longitudinal slot in said body, said slot extending generally in the direction of said desired travel path to establish a threading entrance to said guide for said flexible strip when a lateral edge of said strip is in edgewise orientation with respect thereto; and a deflecting surface communicating with said slot and said desired travel path, said deflecting surface being configured so as to deflect a lateral edge of a flexible strip threaded into said slot through said desired twist angle.
2. A guide for threading a flexible strip into a travel path having a desired twist angle, said guide comprising: a body; a longitudinal slot in said body, said slot extending generally in the direction of said desired travel path to establish a threading entrance to said guide for said flexible strip when a lateral edge of said strip is in edgewise orientation with respect thereto; and a deflecting surface communicating with said slot and said desired travel path, said deflecting surface being configured so as to deflect a lateral edge of a flexible strip threaded into said slot through said desired twist angle.
US00336141A 1973-02-26 1973-02-26 Flexible strip threading guide Expired - Lifetime US3802615A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US00336141A US3802615A (en) 1973-02-26 1973-02-26 Flexible strip threading guide
FR7405331A FR2219096B1 (en) 1973-02-26 1974-02-18
DE2409063A DE2409063A1 (en) 1973-02-26 1974-02-25 SINGLE GUIDE DEVICE FOR RUNNING PROJECTORS
GB868074A GB1456111A (en) 1973-02-26 1974-02-26 Guide for facilitating manual insertion of a flexible strip into a travel path
HK253/77A HK25377A (en) 1973-02-26 1977-05-26 Guide for facilitating manual insertion of a flexible strip into a travel path
MY287/77A MY7700287A (en) 1973-02-26 1977-12-30 Guide for facilitating manual insertion of a flexible strip into a travel pathe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00336141A US3802615A (en) 1973-02-26 1973-02-26 Flexible strip threading guide

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US3802615A true US3802615A (en) 1974-04-09

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US00336141A Expired - Lifetime US3802615A (en) 1973-02-26 1973-02-26 Flexible strip threading guide

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US (1) US3802615A (en)
DE (1) DE2409063A1 (en)
FR (1) FR2219096B1 (en)
GB (1) GB1456111A (en)
HK (1) HK25377A (en)
MY (1) MY7700287A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122650A (en) * 1975-03-31 1978-10-31 Mcdonald W B Paper carrier for roll paper machines
US5487512A (en) * 1990-05-21 1996-01-30 Toray Industries, Inc. Take-up apparatus for and package of tape type non-twisted carbon fiber bundle
EP0595204B1 (en) * 1992-10-30 1999-03-31 Fuji Photo Film Co., Ltd. Automatic photofinishing apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2250138A (en) * 1940-02-01 1941-07-22 Morgan Construction Co Apparatus for handling elongated material
US2890619A (en) * 1954-10-05 1959-06-16 Vitarama Corp Motion picture camera apparatus with film supply unit separate from film exposure unit
US3094293A (en) * 1960-01-08 1963-06-18 Motorola Inc Tape feeding and storage device
US3548783A (en) * 1968-08-12 1970-12-22 Xerox Corp Paper transport-sheet turner
US3707254A (en) * 1971-03-19 1972-12-26 Rca Corp Aerial photography

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2250138A (en) * 1940-02-01 1941-07-22 Morgan Construction Co Apparatus for handling elongated material
US2890619A (en) * 1954-10-05 1959-06-16 Vitarama Corp Motion picture camera apparatus with film supply unit separate from film exposure unit
US3094293A (en) * 1960-01-08 1963-06-18 Motorola Inc Tape feeding and storage device
US3548783A (en) * 1968-08-12 1970-12-22 Xerox Corp Paper transport-sheet turner
US3707254A (en) * 1971-03-19 1972-12-26 Rca Corp Aerial photography

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122650A (en) * 1975-03-31 1978-10-31 Mcdonald W B Paper carrier for roll paper machines
US5487512A (en) * 1990-05-21 1996-01-30 Toray Industries, Inc. Take-up apparatus for and package of tape type non-twisted carbon fiber bundle
EP0595204B1 (en) * 1992-10-30 1999-03-31 Fuji Photo Film Co., Ltd. Automatic photofinishing apparatus

Also Published As

Publication number Publication date
MY7700287A (en) 1977-12-31
GB1456111A (en) 1976-11-17
FR2219096A1 (en) 1974-09-20
FR2219096B1 (en) 1976-11-26
DE2409063A1 (en) 1974-09-05
HK25377A (en) 1977-06-03

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