US3641322A - Presettable counter for copying apparatus - Google Patents

Presettable counter for copying apparatus Download PDF

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Publication number
US3641322A
US3641322A US23287A US3641322DA US3641322A US 3641322 A US3641322 A US 3641322A US 23287 A US23287 A US 23287A US 3641322D A US3641322D A US 3641322DA US 3641322 A US3641322 A US 3641322A
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United States
Prior art keywords
locking
wheel
counting wheel
counting
set forth
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Expired - Lifetime
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US23287A
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English (en)
Inventor
Jurgen Limberger
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.)
Lumoprint Zindler KG and Co GmbH
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Lumoprint Zindler KG and Co GmbH
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/04—Design features of general application for driving the stage of lowest order
    • G06M1/041—Design features of general application for driving the stage of lowest order for drum-type indicating means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/02—Counting the number of copies; Billing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/04—Design features of general application for driving the stage of lowest order
    • G06M1/041—Design features of general application for driving the stage of lowest order for drum-type indicating means
    • G06M1/042—Design features of general application for driving the stage of lowest order for drum-type indicating means with click devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M3/00—Counters with additional facilities
    • G06M3/02—Counters with additional facilities for performing an operation at a predetermined value of the count, e.g. arresting a machine
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M7/00—Counting of objects carried by a conveyor
    • G06M7/02—Counting of objects carried by a conveyor wherein objects ahead of the sensing element are separated to produce a distinct gap between successive objects
    • G06M7/06—Counting of flat articles, e.g. of sheets of paper

Definitions

  • a presettable counting device such as is usable in a copying apparatus includes a rotating element set to rotate through a certain angle for each cyclic operation of the device.
  • a presettable counting wheel is spaced from the rotating elements and their axis are disposed in parallel relationship. Number panels in a numbered sequence are provided on the circumferential periphery of the counting wheel commencing from a zero position.
  • a spring drive member biases the counting wheel toward the zero position.
  • a toothed locking wheel is connected to the counting wheel and locking levers extend between the toothed locking wheel and a multiple cam on the rotating element for holding the counting wheel and effecting its stepwise return to the zero position.
  • a signalling device can be incorporated into the counting device to indicate when the counting wheel has returned to the zero position.
  • the preferred embodiment relating to copying apparatus, is based on the fact that occasionally several copies must be made from one original, and this number of copies may vary from one original to another. Although it is known to provide a comparatively complicated device which controls automatically the manufacture of several copies, particularly in apparatus in which the original may remain on the exposure plate, this solution is very expensive and requires a type of apparatus in which the original fulfills no switching function.
  • the rotating element has a multiple cam, and preferably a twin cam arrangement with at least one raised cam on adjacent cam tracks, and collaborating with at least one raised cam on adjacent cam tracks, and collaborating with at least two alternatively disengageable locking levers which free a counting wheel with at least one associated locking wheel intermittently from its toothing, wherein the assembly of counting wheel and locking wheel is spring biased in the direction of resetting the counting wheel into a zero position and the free rotation of the counting wheel against the spring drive by means of the engaging locking levers is provided.
  • the invention requires only one rotating element because the locking wheels and the counting wheel, having number panels on its circumference, may be made in one piece so that only a locking lever arrangement and a spring for driving the counting wheel must be additionally provided.
  • this construction is very complex and particularly suitable for copying apparatus because the counting wheel may protrude with one part of its periphery through an opening in a housing wall, which is provided with a pointer, permitting a number panel to be selected, wherein the operating element is the protruding section of the periphery of the wheel which may be provided with a knurling.
  • the toothing of the at least one locking wheel is substantially sine shaped, and permits an adjustment under the locking levers in differentdirections, wherein the force of the locking levers is so dimensioned, by weight or spring, that they retain the counting wheel against the spring drive.
  • the toothing of the at least one locking wheel is sawtoothed shape and blocks the random rotation of the counting wheel with engaging locking lever in the direction of a resetting of the counting wheel by the spring drive.
  • the invention provides a resetting by means of a one way coupling between the said at least one locking wheel and the counting wheel, wherein the coupling remains in engagement under the bias of the spring drive, but permits the adjustment of the counting wheel between the two elements of the coupling in the direction of the spring drive.
  • this one way coupling is a spring-loaded toothed coupling with saw-toothed-shape teeth in which the sloping flank permits the adjustment in-the direction of the spring drive, and wherein the coupling spring is strong enough to maintain the engagement under the force of the spring drive in a slip-free condition.
  • the rotational path comprising one or two teeth of a locking wheel corresponds to one number panel of the counting wheel, the periphery of which carries several successive number panels. If only one locking wheel with a single toothing is used for two locking levers, each panel comprises two tooth divisions.
  • the raised cams for the different locking levers are offset relative to each other, for example in the case of two locking levers and two locking wheels by half the angle through which the rotating element rotates with each working stroke. In the case of several elements, the offset would amount to a corresponding fraction.
  • the construction with two locking levers is the particularly preferred embodiment of the invention, in which the movement of the counting wheel through one panel, occurs in two steps.
  • the number of steps for one number panel would correspond to the chosen number of elements.
  • this construction may have special advantages where certain control steps are to be performed during one working stroke.
  • the locking levers have lateral crossmembers directed towards the counting wheel or a disk connected therewith and provided with cams for the crossmembers in a position such that after the passage of the digit 1 during the counting, they lift the locking levers out of engagement with the associated locking wheel or wheels; a stop is provided which stops the rotation of the counting wheel in the zero position.
  • the abutment on the counting wheel cooperates with a stop which engages when the locking wheel reaches a zero position.
  • This engagement may be direct or indirect. Stopping of the counting wheels indicates at least the completion of the required number of strokes by means of the pointer to a certain number panel. The stop may, however, also block the connected apparatus.
  • the signalling equipment mentioned in the following may be optical or acoustic and actuable as a function of the counting wheel running into the zero position.
  • a preferably acoustic signalling device in the shape of a bell mounted, for example, on a wall of the housing in which the clapper, spring loaded by a spring or by the weight distribution so as to return into the starting position, is a pivoting lever and extends either into the path of the stop or may be actuated by a cam of the rotating element in conjunction with a cam plate on the counting wheel.
  • the clapper has an elastic leg and the stop forms an abutment for a rigid leg of the clapper which engages the abutment after striking the bell and thereby stops the counting wheel.
  • the cam disk is provided in concentric arrangement to the counting wheel and has a step-shaped recess corresponding to the zero position of the counting wheel and adapted to receive a lug of the elastic clapper guided by spring force along the revolving element and along the cam disk, causing to strike the bell when running into the recess and being released by its cam.
  • the locking levers are pivoting levers and are biased by springs pulling them into engagement.
  • the cam is provided with two raised cams in two parallel cam tracks, offset circumferentially through 180, and in which case two locking wheels and two locking levers are provided.
  • FIG. 1 shows a side elevation of the counting device according to the invention, with one wall of an apparatus being sectionalized along the line [-1 in FIG. 2;
  • FIG. 2 is a plan view of FIG. 1 with some parts omitted;
  • FIG. 3 is a side elevation of another embodiment of the invention, showing merely the parts necessary for explaining the same;
  • FIG. 4 is a plan view of FIG. 3;
  • FIG. 5 shows diagrammatically an apparatus and explains the arrangement of the counting mechanism in a copier
  • FIG. 6 shows diagrammatically the construction of an apparatus and explains the arrangement of the counting mechanism.
  • a mounting arrangement 1 comprises, in integral construction, a counting wheel 2 and locking wheels 3 and 4.
  • the locking wheels are shown to have different diameters, it is, of course, equally possible to use locking wheels with the same diameters.
  • the locking wheel 4 has a shaft extension 5 which is affected by a spring drive 6, the spring being, for example, wound by means of a band 7 about the shaft extension and being fixed at 8. As may be seen from FIG. 2, the counting wheel is not in the zero position and the spring 6 is therefore tensioned. The other end of the spring is fixed to a frame as at 8.
  • the actuating arrangement by means of the spring 6 has merely the object of rotating the counting wheel through the maximum counting distance, that is to say, once through 360.
  • the circumference of the counting wheel is provided with number panels, 9, 10, 11.
  • the dimensions of these number panels in the direction of the circumference is related to the spacing between the teeth of the locking wheels.
  • One tooth spacing of the toothing 12, I3 corresponds to the length of a number panel in the direction of the circumference, for example the distance between the teeth 14 and 15.
  • the toothing l2, 13 is so toothed shaped so that the steep flank of a tooth is leading during the actuation by the spring 6.
  • Two pivotable locking levers 17, 18 are mounted in a mounting 16 in a frame and have at their free ends pawls 19, 20 which engage into the toothing and may be formed in accordance with the recesses between the teeth.
  • the locking levers are affected by springs 21, 22 which pull the locking levers against a double cam 23 arranged on the intermittently rotating element 24, for example a shaft, and rotating in this embodiment through 180 for each working stroke.
  • the twin cam has two camtracks 25, 26 each with a raised portion 27, 28 which are offset relative to each other through 180.
  • the counting wheel protrudes with a portion 29 from an opening 30 of a housing wall 31. Adjacent to the opening 30 there is a marker, such an arrow 32, indicating one number panel.
  • the number panels may be located between two knurled strips 33, 34 acting simultaneously as actuating elements for selecting the number of working strokes or for setting the number wheel 2.
  • the number wheel has a stop 35, e.g., in the shape of a pin, and corresponding to the zero position.
  • a collaborating abutment is provided in this embodiment in conjunction with a signaling device to be described further below.
  • the counter wheel 2 is rotated in a clockwise direction, as viewed in FIG. 1, until the desired number of strokes appears opposite the marker 32.
  • the pawls 19, 20 slide over the toothing l2, [3.
  • the twin cam 23 is rotated through 360. During this, first the pawl 17 is released enabling it to engage in front of the tooth 36. Next the raised cam 28 lifts the pawl lever l8, so that the assembly of counting wheel 2 and locking wheels 3, 4 is rotated until the tooth 36 engages. During the further rotation the raised cam 28 releases the locking lever 18 which engages in front of the tooth 37.
  • the counting wheel 2 has cams 38, 93 and the locking levers 17, 18 have crossmembers 89, extending laterally towards the counting wheel and into the path of the earns 38, 93. It should be noted that these earns 38, 93 are on a smaller radius than the stop 35.
  • the cams 38, 93 are so located that when the number panel 1 has passed the marker 32 the pawls 19, 20 are lifted out of engagement with the locking wheels, enabling the spring 6 to rotate the counting wheel until the stop 35 meets its abutment and the whole device is stopped.
  • the abutment 91 is formed in conjunction with an acoustic signaling device which is triggered off when the number panel 0 is released at the marker 32.
  • the signalling device is a bell 39 arranged on the housing wall 31, and having a clapper 40 in the shape of a two-armed angled lever. This lever is mounted at 41 and is acted upon by a spring 42 tending to pull the clapper into a starting position against a stop 92.
  • the clapper has one elastic leg 43 which is held in front of the bell 39 in the inoperative position. The end of the other leg 40, remote from the leg 43 and made of a rigid material, projects into the path of the stop 35.
  • this embodiment comprises a unit consisting of a counting wheel 58, a locking wheel 59 and a one way coupling 60, mounted rotatably on a spindle 62, located, for example, in a housing 61.
  • This unit is pushed axially by a spring 63 against an abutment 64 on the spindle 62.
  • the counting wheel 58 is also provided with a cam plate 64, serving to actuate a clapper 65 for a bell 66.
  • a spring drive 67 is provided in connection .with a disk 68 and tends to return thecounting wheel into the zero position.
  • the coupling halves 69, 70 of the coupling 60 engage by means of saw-toothed-shape coupling teeth, the shape of which is such that when the locking wheel 59 is standing still, the counting wheel can be rotated in the direction of the spring drive 67 so as to return an excessive adjustment.
  • the spring 63 yields.
  • this construction comprises a cam 71 with two raised cams 72, 73 arranged on parallel tracks and cooperating with two locking levers 74, 75 which are pivotable in a mounting 76 and are pulled by springs 77, 78 (not shown in FIG. 4), into engagement with the locking wheel 59 or the raised earns 72, 73.
  • the locking pawls 79, 80 of the locking levers are offset relative to each other by half a tooth spacing, so that they engage successively and during one revolution of the cam or of the shaft 71 the counting wheel 58 is advanced by one tooth spacing.
  • the clapper 65 pivotable about a pivot 81, is associated with a raised cam 82 on the shaft which pivots it against the force of a spring 83 during the passage of each number panel.
  • the spring 83 pulls a lug 84 arranged on the clapper 65, against the cam plate 64. During this the resilient clapper may be deflected.
  • the cam plate has a recess 85 with a radially stepped flank 86 and a shallow rise 87.
  • the connected apparatus When the counting wheel 58, with the number panels, is adjusted in a clockwise direction, causing the spring drive 67 to be tensioned, the connected apparatus is in the starting position in which the raised cam 82 holds the clapper outside the cam plate 4, permitting the stepped flank 86 to bypass the lug 84.
  • the lug comes to rest on the periphery of the cam plate 64, so that the clapper 88 does not reach the bell.
  • the step flank 86 has passed the lug and the clapper, released by the cam 82, engages into the recess and strikes the bell.
  • the lug 84 may also be used as end stop if the recess 85 is suitably shaped.
  • the shaft 24 in FIGS. 1 and 2, or 71 in FIGS. 3 and 4 corresponds to the so-called switching roller 44 in front of a stack 45 of sheets of copying paper.
  • the switching roller 44 has a flattened portion 46 so that, in the position shown, in which it is locked by a pivoting lever 47, it forms a gap with a continuously revolving transport roller 48.
  • the withdrawing roller 54 carries a sheet of copying paper between the roller 44, 48 to a switching arm 55 actuation of which causes the circuit for an operating magnet 56, for driving the withdrawing roller 44, to be broken, and the circuit for the actuating magnet 49 to be prepared.
  • FIG. 6 The arrangement of the parts in a copying apparatus is shown in FIG. 6, in which identical parts are designated by the same reference numerals.
  • a housing 95 has on its upper surface a glass plate 96, forming part of an exposure device, over which a sheet of copying paper may be pushed in the direction indicated by the arrow 51.
  • the glass plate is flanked by driven pairs of transport rollers 97, 98 of which one is shown in FIG. 5.
  • the transport path 99 continues through further treatment sections 101, 102 to a delivery dish 103.
  • the part 29 of the counting wheel 2 projects from the upper surface 31 of the housing.
  • the shaft is located in mounting walls.
  • the locking levers 17, 18, shown by dotted lines, and mounted at 16 collaborate with the locking wheels 12, 13. They bypass the spindle of the switching roller 24, 44 which contains at this point the cam tracks 25, 26.
  • the counting wheel 2 may be set at a certain number and a signal is given either acoustically or visually to indicate that the required number of copies has been made.
  • the mountings such as 16, 41, 76, 81 described in FIGS. 1 to 4, and the mountings of the shafts 5, 62, and the like are provided in the walls of the housing of the apparatus and possibly in partitions extending parallel to the plane of the drawing to the housing walls in FIG. 6.
  • a presettable counting device comprising a rotating element rotating through a certain angle for each cyclic operation of said device, a presettable counting wheel mounted rotatably and axially parallel spaced apart from the rotating element, and having number panels on its circumference, at least one locking wheel having a toothing on the periphery thereof and connected nonrotatably with the counting wheel, a multiple cam with cam tracks in side-by-side arrangement, and each having at least one raised cam wherein the multiple cam is arranged on said rotating element for rotation therewith, at least two locking levers mounted pivotally and axially parallel to the rotating element, a first part of each of said locking levers cooperating with one of said raised cams on one of said cam tracks, a second part of each of said locking levers being provided with locking parts which successively engage said toothing upon rotation of said rotating element, spring drive means biasing said counting wheel and said locking wheel from a preset into a zero position, and indicat ing means adjacent to the periphery of the counting wheel for indicating the count at a given
  • a device as set forth in claim 1, in which the toothing of the at least one locking wheel is substantially sine shaped, the locking parts are formed corresponding to the recesses of the sine-shaped toothing, and the locking wheel is adjustable under the locking levers in different directions, and springs bias the force of the locking levers so that they hold the counting wheel against the spring drive means.
  • a device as set forth in claim 1, in which the toothing of the at least one locking wheel is saw-toothshaped and the locking parts have a corresponding configuration, and the steeper flank of the saw-toothed-shaped toothing is arranged relative to the action of the spring drive means, so that the arbitrary rotation of the counting wheel is blocked for resetting of the counting wheel by said spring drive means when said locking parts of said locking levers are arranged in engagement with the toothing.
  • a device as set forth in claim 3, comprising a one-way coupling incorporated in a unit including said at least one locking wheel and said counting wheel and arranged between said locking wheel and counting wheel, and said coupling having coupling halves engaged in such a manner that the engagement of said coupling is maintained under the load of said spring drive means, while permitting the adjustment of the counting wheel against the locking wheel by rotation between the coupling halves in the direction of action of the spring drive means.
  • a device as set forth in claim 4, wherein the one-way coupling is spring loaded with each of said coupling halves having saw-toothed-shaped teeth which interengage the sawtoothed-shaped teeth of the other coupling half, and the sawtooth-shaped teeth having sloping flanks which permit an adjustment between the coupling halves by rotating the counting wheel in the direction of action of the spring drive means, and
  • a coupling spring arranged for urging said saw-tooth-shaped teeth of said coupling halves into interengagement and said coupling spring being strong enough to maintain the engagement under the action of said spring drive means in a slip-free condition.
  • a device as set forth in claim 3, wherein not more than two tooth divisions of the toothing on said locking wheel correspond to an angle of rotation which is equal to the angle of rotation occupied by one said number panel on the circumferential periphery of said counting wheel, and the circumferential periphery of said counting wheel contains a plurality of said number panels arranged in sequence.
  • each of said raised cams is arranged for raising a different one of said locking levers and said locking levers are offset by half the angle through which the rotating element rotates for each cyclic operation.
  • a device as set forth in claim 6, comprising two said locking wheels with the toothing of each being mutually offset in the zone of one tooth division, and the locking parts of said locking levers arranged to engage substantially in one plane.
  • a device as set forth in claim 6, comprising one said locking wheel and two said locking levers, said locking wheel having an axially continuous toothing, and the locking parts of said locking levers being offset relative to each other by an amount corresponding to half a tooth division.
  • a device as set forth in claim 7, wherein said number panels on said counting wheel are arranged in a numbered sequence commencing from the zero position with the number 1, a crossmember secured to and extending laterally from each of said locking levers and said crossmernbers being directed toward the counting wheel, a pair of cams secured to the counting wheel and each said cam arranged to extend into the path of a different one of said lateral members at a point such that said cams abut against said lateral members after the number panel corresponding to the number 1 has passed said indicator means during the counting of a process and the locking levers being disengaged from the associated said locking wheel, a stop on said counting wheel, and an abutment arranged to be contacted by said stop when the number panel bearing number 1 passes said indicating means and stops the rotation of said counting wheel in the zero position.
  • a device as set forth in claim 10, wherein a signalling device is associated with said stop and abutment and is released when said stop reaches the position corresponding to the position in which the number panel bearing the number 1 passes said indicating means, and said counting wheel reaches its zero position.
  • a device as set forth in claim 1, wherein a signalling device is associated with the number panels on the circumference of said counting wheel, and an actuating means is positioned between the counting wheel and said signalling device and is arranged to actuate said signalling device when the counting wheel reaches its zero position.
  • a device as set forth in claim 12, characterized therein by a housing wall, said signalling device comprises a bell mounted on said housing wall and providing an acoustic-type signalling device, a stop secured to said counting wheel, an abutment, and a pivoting lever extending into the path of said stop and forming a movable clapper arranged to strike said bell.
  • a device as set forth in claim 12, characterized therein by a housing wall, said signalling device comprising a bell mounted on said housing wall and providing an acoustic-type signalling device, a pivoting lever having a lug thereon forming a movable clapper arranged to contact the bell, an additional cam track positioned on said rotating element and having a raised cam arranged to engage said pivoting lever, and a cam disc secured to said counting wheel so that the periphery of said cam disc makes contact with said lug on said pivoting lever and said cam disc having a recess arranged so that, when said counting wheel reaches the zero position, said lug on said pivoting lever engages into the recess and said pivoting lever strikes said bell under the action of said raised cam on the additional cam track.
  • said pivoting lever comprises an elastic leg having a striking element thereon and a rigid leg, said abutment being fixed and arranged to be contacted by said rigid leg and said elastic leg and striking element arran ed to strike said bell so that when said stop contacts said rigit? leg of said pivoting lever, said rigid leg is pivoted into contact with said abutment and said elastic leg strikes said bell and the engagement of said stop and said rigid leg effects the stopping of the counting wheel.
  • a device as set forth in claim 1, wherein spring means are connected to each of said locking levers, said spring means moving said locking lever so that said locking part resiliently engages within the toothing of said locking wheel.
  • said rotating element comprises a switching roller for use in a copying apparatus equipped with a stack holder with copying sheets, a withdrawing holder arranged on the top most sheet of the stack to withdraw the sheet, and transport means, and said rotating element being associated with the transport means behind the stack holder and carrying out a rotation through 360 for the transport of a sheet of copying paper from the stack holder, and said multiple cam arranged for rotation in conjunction with said switching roller and having two raised cams offset through 180 and arranged on said cam tracks which are in parallel relationship.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnetism (AREA)
  • Transmission Devices (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Gears, Cams (AREA)
US23287A 1969-04-03 1970-03-27 Presettable counter for copying apparatus Expired - Lifetime US3641322A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1917187A DE1917187B2 (de) 1969-04-03 1969-04-03 Zählvorrichtung für Arbeitstakte

Publications (1)

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US3641322A true US3641322A (en) 1972-02-08

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US23287A Expired - Lifetime US3641322A (en) 1969-04-03 1970-03-27 Presettable counter for copying apparatus

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US (1) US3641322A (de)
BE (1) BE748378A (de)
CH (1) CH527064A (de)
DE (1) DE1917187B2 (de)
DK (1) DK122294B (de)
FR (1) FR2041126B1 (de)
GB (1) GB1255902A (de)

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US3916167A (en) * 1974-04-15 1975-10-28 Xerox Corp Counters
FR2445562A1 (fr) * 1978-12-26 1980-07-25 Pitney Bowes Inc Dispositif de mise en marche et de comptage a rebours pour machine a fonctionnement cyclique et tableau de commande comportant un tel dispositif
US4255650A (en) * 1979-08-30 1981-03-10 Minnesota Mining And Manufacturing Company Mechanical counter
US20230061656A1 (en) * 2019-12-27 2023-03-02 Topjet Technology Co. Ltd. Counting assembly and developing box having same

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Publication number Priority date Publication date Assignee Title
CN110280705B (zh) * 2019-05-31 2020-10-27 芜湖市恒浩机械制造有限公司 一种汽车板件加工用统计式锻造机
CN113946108B (zh) * 2021-11-23 2024-07-19 珠海市源呈数码科技有限公司 一种显影盒

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US2036139A (en) * 1930-02-07 1936-03-31 American Laundry Mach Co Laundry marker counter
US1940134A (en) * 1930-09-02 1933-12-19 Max E Zimmon Golf score counter
DE829305C (de) * 1948-10-02 1952-01-24 Siemens & Halske A G Zaehlwerk zur Bestimmung der Zeilenlaenge bei Fernschreibgeraeten mit Tastenwerk
US2746464A (en) * 1951-01-10 1956-05-22 Reis Eugen Counting machines for coins and similar flat bodies
US2868456A (en) * 1952-12-24 1959-01-13 Rotaprint Ltd Control means for printing or duplicating machines
US3201040A (en) * 1962-12-21 1965-08-17 Gestetner Ltd Counting mechanisms
US3229908A (en) * 1964-04-01 1966-01-18 Dick Co Ab Presettable automatic resetting counter for duplicating machines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916167A (en) * 1974-04-15 1975-10-28 Xerox Corp Counters
FR2445562A1 (fr) * 1978-12-26 1980-07-25 Pitney Bowes Inc Dispositif de mise en marche et de comptage a rebours pour machine a fonctionnement cyclique et tableau de commande comportant un tel dispositif
US4255650A (en) * 1979-08-30 1981-03-10 Minnesota Mining And Manufacturing Company Mechanical counter
US20230061656A1 (en) * 2019-12-27 2023-03-02 Topjet Technology Co. Ltd. Counting assembly and developing box having same
US11852990B2 (en) * 2019-12-27 2023-12-26 Topjet Technology Co., Ltd. Counting assembly and developing box having same

Also Published As

Publication number Publication date
FR2041126B1 (de) 1974-03-01
BE748378A (fr) 1970-09-16
DK122294B (da) 1972-02-14
CH527064A (de) 1972-08-31
DE1917187B2 (de) 1974-06-20
DE1917187A1 (de) 1970-10-15
GB1255902A (en) 1971-12-01
FR2041126A1 (de) 1971-01-29
DE1917187C3 (de) 1975-02-06

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