US3635387A - Incremental web feeding means - Google Patents
Incremental web feeding means Download PDFInfo
- Publication number
- US3635387A US3635387A US880866A US3635387DA US3635387A US 3635387 A US3635387 A US 3635387A US 880866 A US880866 A US 880866A US 3635387D A US3635387D A US 3635387DA US 3635387 A US3635387 A US 3635387A
- Authority
- US
- United States
- Prior art keywords
- takeup
- flexible
- rotary driving
- rotary
- driving member
- 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
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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
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/58—Baseboards, masking frames, or other holders for the sensitive material
- G03B27/587—Handling photosensitive webs
Definitions
- ABSTRACT Readily adjustable web-feeding means which, in the specific form disclosed, embodies a chain and sprocket drive with a takeup crank arm engaging an intermediate portion of the chain to produce an intermittent driving action which is readily adjustable from a location remote from the crank arm by varying the relationship between the engaged chain segment and the crank arm axis such as by moving by means of a remote-controlled mechanism one end of the engaged chain segment such as the anchored end of the chain whereby the effective takeup stroke on the chain can be varied.
- variable feed mechanism which has a readily accessible control member located remotely of the actuating mechanism.
- a further and more specific object of the present invention is to provide a readily adjustable intermittent drive for a feed mechanism which accelerates the paper feed gradually and may also provide gradual deceleration.
- Another object of the present invention is to provide a variable feed mechanism for operation at a high speed which has a brake mechanism actuated during deceleration to prevent overrun of the feed rollers.
- FIG. I is a diagrammatic elevational view of a supply and takeup mechanism for a photographic printer including my new adjustable feed mechanism;
- FIG. 2 is a perspective diagrammatic view of my variable feed mechanism
- FIG. 3 is a side elevational view of one step in the operational cycle of my variable feed mechanism
- FIG. 4 is a diagrammatic elevational view of another step in the operational cycle of my variable feed mechanism
- FIG. 5 is a side elevational view showing adjustment of my variable feed mechanism.
- a driving roller 11 is provided to draw a web of sheet material 12 from supply reel 10.
- the web constitutes photographic printing paper although other'rnaterial may be used.
- a loop 12a is provided to isolate the reel from surges resulting from periodic operation of the feeding mechanism,
- Rollers 13 and 14 feed the web into the printing area A while rollers 16 and 17 provide tension and draw the material 12 through the printing area A. Rollers 16 and 17 are slightlyv larger than rollers 13 and 14 so as to maintain tension on the web in the printing area.
- a takeup reel 18 is provided for the material 12 which passes over an idler roller 19.
- An ordinary numbering mechanism provides an identifying mark for each individual section of material passing through the printing area.
- a chain 20 is provided to drive sprockets 22 and 24 thereby driving rollers 17 and 14 respectively.
- Rollers 13 and 16 are driven by gears a and b which engage gears c and d associated with rollers 14 and 17 respectively.
- clutches 19 respectively associated with the drive shafts of the sprockets 22 and 24 which allow the chain to drive the material 12 in a forward direction only, slippage of the clutches occurring as the spring 21 causes return movement of the chain at the end of the forward takeup movement during each cycle.
- a drive wheel 26 is provided and is connected to a mechanism (not shown) which drives the ,drive wheel 26 plication previously identified herein.
- Thetakeup movement for each cycle of operation is produced by an idler wheel such as the sprocket 28-which engages an intermediate portion of the chain 20.
- Suitable means for. producing lateral takeup movement of the chain and takeup wheel 28 is provided such as the rotary disk member 26 on which the takeup wheel 28 is mounted.
- the wheel 26 in effect provides a crank arm for producing the desired lateral movement of said takeup wheel 28 andalso confines the portion of the chain engaged with said wheel ,28 to maintain driving engagement therebetween.
- the crank arm or disk prevents the chain from bypassing the engaging. member or takeup wheel 28 and becoming entangled in the .mechanism.
- the surface of the wheel 26 may be coated with vibration damping and absorbing materials known as nylon and teflon which are readily available on the market.
- FIG. 1 the mechanism is shown in its initial starting position.
- a brake arm 30 is mounted on a suitable support, shown diagrammatically, at a fixed pivot point 32.
- a brake bank 36 is attached to the brake arm at 38 and extends over a brake drum 40 to a suitable stationary mounting.
- the brake is shown in the engaged position causing friction between the brake drum 40 and the brake band 36.
- the drive wheel 26 acts as a cam and is engaged by the follower wheel 34 on the brake arm 30.
- a cam lobe is provided which commences with the inclined rise portion 42iand terminates with the decline portion 44.
- the mechanism for varying the amount of takeup produced by the lateral movement of the takeup wheel 28 during its eccentric revolution about the axis of the drive wheel 26 can be readily adjusted by varying the position of the portion of the chain 20 engaged by the takeup wheel 28 and the axis of rotation of the wheel 26.
- this adjustment is accomplished by providing an anchor 50 at the end of the chain 20 opposite the end attached to the spring 2!. Suitable means for moving the anchor 50 are provided such as the adjusting screw 46 which is operable by the crank 48.
- a position indicating scale 51b is provided which can be calibrated to read the length of photographic material driven by the chain when the anchor 50 is in the indicated position.
- An indicating arrow 51a is mounted on the anchor 50 -to indicate the position of the anchor at any particular setting of the adjusting mechanism.
- a shield 52 may be provided to prevent .lateral vibration of the chain 20 by enclosing the chain between the drive wheel 26 and the shield.
- the shield may be spring loaded against the chain so that a substantial vibration damping is achieved without increased friction drag on the mechanism.
- the shield may be coated with a low friction resilient vibration damping material just as is wheel 26 as shown in FIG. 2.
- drive wheel 26 is shown at the initiation of a cycle of operation.
- the wheel is shown slightly advanced in its revolution, the idler wheel 28 slightly engaging chain 20 and the wheel 34 on the inclination 42.
- the idler wheel 28 engages the chain 20
- the chain is drawn in such a fashion that the sprockets 22 and 24 turn counter clockwise thereby driving the photographic material through the viewing area by turning rollers 13, 14, 16 and 17.
- the brake band 36 is released from brake drum 40. It will be seen that as the chain 20 is driven the spring 21 is extended.
- FIGS. 4 and 5 Further illustration is provided in FIGS. 4 and 5 showing that as the drive wheel 26 advances in its revolution it causes a greater and greater deflection of the chain 20 until it reaches the point of maximum advancement shown in FIG. 4. It will be understood that as the wheel 28 initially engages the chain, the deflection will commence at a relatively slow rate and the rate of deflection will increase as the result of the harmonic motion of the takeup wheel. i
- FIG. illustrates the adjustment of the drive length of the variable feed mechanism.
- the screw 46 has been adjusted by the operator using handle or crank 48 to a position in which the maximum deflection of the chain 20 by idler wheel 28 produces a minimum deflection as compared to other possible adjustments.
- This is completely illustrated by the dotted line portion B showing the chain undeflected in its new position and C showing the deflection of the chain with the anchoring point 50' in the position shown in the other figures.
- the operator would move the anchoring point 50 from the old position 50' shown in FIG. 5 to the new position that some advancement of the chain and sprocket would occur causing wastage of a small portion of photographic material.
- the slight advancement of the chain and increased tension on the spring 21 in the initial position will have no effect on the operation of the mechanism. It is possible to adjust the mechanism while in operation to obtain the desired length.
- the advancing mechanism operates at a high rate of speed, sometimes in fact operating well in excess of 100 times a minute.
- the drive wheel 26 starts from an initial position such as is shown in FIG. 1 or FIG. 3, and advances clockwise through one complete revolution.
- the brake band 36 is released from the brake drum 40 as a result of the follower wheel 34 on the brake arm riding up the incline 42 of the cam lobe.
- the size of the cam lobe may be suitably adjusted so as to reengage the brake at a predetermined optimal portion of the operating cycle.
- FIG. 2 the cycle of operation is shown in its beginning stages with the acceleration of the photographic material just commencing as the brake mechanism is being released.
- FIG. 4 the mechanism is shown at maximum displacement as one full frame of photographic material has been advanced.
- the brake is applied at or slightly before the point of maximum velocity so that when the advancement portion of the cycle ceases, no overrun of the photographic material in the feed rollers occurs. This provides for proper framing and positioning of the photographic material.
- the amount of braking applied can, of course, be adjusted in many ways to produce the desired deceleration and drag characteristics on rollers 13 and 14.
- variable adjustment feature of the invention is shown in FIG. 5 in which an external crank or handle 48 may be readily adjusted by the operator to reposition the anchoring point 50 the chain and thus adjust the feed length of the individual frames of photographic web 12.
- the track along which the anchoring point 50 travels as a result of operation of the screw and handle may be at an inclination to more closely approximate a tangent with the drive wheel 26 so that relatively little advancement of the chain 20 will occur as the mechanism is adjusted for a different feed length.
- Anchor 50 may also travel in an arc, thereby causing no unwanted advancement. Also, if the drive wheel 26 is moved back and forth for adjustment, no unwanted advancement will occur.
- This invention has numerous advantages. As a result of the circular motion of the idler wheel 28 on the drive wheel 26, the chain and consequently the photographic material is driven in a harmonic motion as a function of time thus providing a gradual acceleration of the photographic material. This gradual acceleration of the photographic material insures that no sudden stresses are placed on the material and, as a result of this, the material-is not likely tojam in the mechanism or to be torn.
- the idler wheel 28 becomes totally disengaged from the chain at the end of a cycle of operation thus allowing the accuracy of the stroke length to become independent of a requirement that the drive wheel 26 stop in exactly the same position at the completion of each cycle. Since the machine is intended for cyclic or intermittent operation, it is highly advantageous that the machine is independent of slight variations of the drive motor in determining feed length.
- feed length adjustments can be made by the mechanical means such as that shown or something comparable without having to make a complicated gear or mechanical change in the rotation and driving equipment. Since the drive length adjustment does not involve adjustment of the crank arm length but involves displacing the anchoring point of the chain, the adjusting handle or crank can be placed in a position convenient to the operator of the machine.
- the adjustment control can be placed in any desired location by the use of mechanical means well known so that the connection to screw 46 can be made through angles or changes in height of the control handle. Adjustments can be made while the unit is in operation. Of course, it will be observed that it will be possible to adjust the feed length of web material such as photographic print paper to any desired size in extremely small increments.
- An adjustable intermittent feeding mechanism for elongated strips of sheet material comprising strip engaging elements to drive said strip intermittently through a working area
- an elongated flexible actuating member operably connected with said stn'p engaging elements and having an intermediately disposed takeup portion
- a rotary driving member mounted from rotation on an axis disposed transversely of said flexible member
- a takeup member mounted on said driving member and positioned for takeup engagement with said intermediate takeup portion of said flexible member and located in radially spaced relation to said axis
- said rotary driving member constitutes a rotary drive wheel and having said takeup member mounted at a distance from the axis of rotation of said wheel.
- a brake means associated with said rotary brake element for engagement therewith.
- the apparatus of claim 6 including means for tightening said brake means on said rotary brake element during a portion of the takeup cycle.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Advancing Webs (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims (14)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US88086669A | 1969-11-28 | 1969-11-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3635387A true US3635387A (en) | 1972-01-18 |
Family
ID=25377287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US880866A Expired - Lifetime US3635387A (en) | 1969-11-28 | 1969-11-28 | Incremental web feeding means |
Country Status (9)
Country | Link |
---|---|
US (1) | US3635387A (en) |
JP (1) | JPS495926B1 (en) |
BE (1) | BE758018A (en) |
CA (1) | CA918693A (en) |
DE (2) | DE7039233U (en) |
FR (1) | FR2072591A5 (en) |
GB (1) | GB1299708A (en) |
NL (1) | NL7015316A (en) |
SE (1) | SE355251B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3762617A (en) * | 1971-03-24 | 1973-10-02 | Hoefliger & Karg | Apparatus for stepwise transport of webs of synthetic plastic material or the like |
US5094061A (en) * | 1989-11-02 | 1992-03-10 | Audion Elektro B.V. | Apparatus for packaging products |
EP0684504A3 (en) * | 1989-12-20 | 1996-01-10 | Dainippon Screen Mfg | |
CN104773569A (en) * | 2015-04-18 | 2015-07-15 | 黄永成 | Novel dishcloth material penetrating machine |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4029250A (en) * | 1975-09-23 | 1977-06-14 | Cx Corporation | Photographic strip transport interval control |
DK154739C (en) * | 1984-09-03 | 1989-05-29 | Eskofot As | REPRODUCTION CAMERA |
US4772923A (en) * | 1987-06-25 | 1988-09-20 | Itek Graphix Corp. | Automatically operated vacuum feed and hold down assembly for camera system |
US4814832A (en) * | 1988-01-28 | 1989-03-21 | Itek Graphix Corp. | Automatic vacuum feed and hold down assembly for camera system |
CN104495458B (en) * | 2014-12-20 | 2016-08-17 | 桐梓县创兴自动化设备有限公司 | A kind of crank-type indexing transfer device for cloth |
CN104494286B (en) * | 2014-12-26 | 2016-12-21 | 青岛玉兰祥商务服务有限公司 | A kind of stable printed medium clamping guide |
CN110054007B (en) * | 2019-05-30 | 2020-12-29 | 西安微电子技术研究所 | Fixed-length conveying indexing mechanism for traction roller |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1023883A (en) * | 1907-04-01 | 1912-04-23 | Detroit Typomarker Company | Automatic pin-ticketing machine. |
US1030183A (en) * | 1906-01-16 | 1912-06-18 | Horace Inman | Paper-feeding mechanism for paper-box machines. |
US2779590A (en) * | 1954-04-02 | 1957-01-29 | Seastrom Mfg Co | Punch press feeding mechanism |
US2950623A (en) * | 1958-09-15 | 1960-08-30 | Weber | Driving mechanism |
FR1246392A (en) * | 1958-11-28 | 1960-11-18 | Italiana Machine Aziendali Fab | Device for the intermittent advancement of a paper web in a cutter with adjustment of the step of this advancement |
US3172592A (en) * | 1962-01-02 | 1965-03-09 | American Foto Patrol Inc | Intermittent strip-feeding device |
-
1969
- 1969-11-28 US US880866A patent/US3635387A/en not_active Expired - Lifetime
-
1970
- 1970-10-15 JP JP45090115A patent/JPS495926B1/ja active Pending
- 1970-10-20 NL NL7015316A patent/NL7015316A/xx unknown
- 1970-10-23 DE DE19707039233U patent/DE7039233U/en not_active Expired
- 1970-10-23 DE DE19702052125 patent/DE2052125A1/en active Pending
- 1970-10-26 BE BE758018D patent/BE758018A/en unknown
- 1970-10-26 SE SE14440/70A patent/SE355251B/xx unknown
- 1970-10-27 GB GB51059/70A patent/GB1299708A/en not_active Expired
- 1970-10-28 CA CA096865A patent/CA918693A/en not_active Expired
- 1970-11-27 FR FR7042861A patent/FR2072591A5/fr not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1030183A (en) * | 1906-01-16 | 1912-06-18 | Horace Inman | Paper-feeding mechanism for paper-box machines. |
US1023883A (en) * | 1907-04-01 | 1912-04-23 | Detroit Typomarker Company | Automatic pin-ticketing machine. |
US2779590A (en) * | 1954-04-02 | 1957-01-29 | Seastrom Mfg Co | Punch press feeding mechanism |
US2950623A (en) * | 1958-09-15 | 1960-08-30 | Weber | Driving mechanism |
FR1246392A (en) * | 1958-11-28 | 1960-11-18 | Italiana Machine Aziendali Fab | Device for the intermittent advancement of a paper web in a cutter with adjustment of the step of this advancement |
US3172592A (en) * | 1962-01-02 | 1965-03-09 | American Foto Patrol Inc | Intermittent strip-feeding device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3762617A (en) * | 1971-03-24 | 1973-10-02 | Hoefliger & Karg | Apparatus for stepwise transport of webs of synthetic plastic material or the like |
US5094061A (en) * | 1989-11-02 | 1992-03-10 | Audion Elektro B.V. | Apparatus for packaging products |
EP0684504A3 (en) * | 1989-12-20 | 1996-01-10 | Dainippon Screen Mfg | |
CN104773569A (en) * | 2015-04-18 | 2015-07-15 | 黄永成 | Novel dishcloth material penetrating machine |
Also Published As
Publication number | Publication date |
---|---|
DE2052125A1 (en) | 1971-06-24 |
BE758018A (en) | 1971-04-01 |
FR2072591A5 (en) | 1971-09-24 |
CA918693A (en) | 1973-01-09 |
JPS495926B1 (en) | 1974-02-09 |
DE7039233U (en) | 1972-06-15 |
SE355251B (en) | 1973-04-09 |
GB1299708A (en) | 1972-12-13 |
NL7015316A (en) | 1971-06-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PRUDENTIAL INSURANCE COMPANY OF AMERICA THE, P.O. Free format text: MORTGAGE;ASSIGNOR:PAKO CORPORATION A DE CORP.;REEL/FRAME:004126/0659 Effective date: 19820618 Owner name: CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPA Free format text: MORTGAGE;ASSIGNOR:PAKO CORPORATION A DE CORP.;REEL/FRAME:004126/0659 Effective date: 19820618 Owner name: FIRST NATIONAL BANK OF MINNEAPOLIS, FIRST BANK PLA Free format text: MORTGAGE;ASSIGNOR:PAKO CORPORATION A DE CORP.;REEL/FRAME:004126/0659 Effective date: 19820618 Owner name: NORTHWESTERN NATIONAL BANK OF MINNEAPOLIS, 7TH STR Free format text: MORTGAGE;ASSIGNOR:PAKO CORPORATION A DE CORP.;REEL/FRAME:004126/0659 Effective date: 19820618 |