DE2014724A1 - Microfilm reader and copier - Google Patents

Description

20IA724

PATENTANWÄLTE Di \ -In.g. HANS RU3CHKE Dlpl.-Ing. Η: ·: ΓΠ ÄGüLAR ■

M 2792

Minnesota Mining and Manufacturing Company, Saint Paul, Minnesota 55101, V.St.A.

Microfilm reader and copier

The invention relates to a machine that has a Has sheet dispensing mechanism that has a support for Includes carrying a stack of sheets of material, as well as' in a way of being simplified and economical Sheet storage conveyor and handling device for one Microfilm reader printer.

Microfilm readers and copiers are well known in the art. It is also known that the read-copy machines optical systems for projecting a light image onto a use heat developable photosensitive sheet material, a visible enlarged print of the microfilm image to create. However, these machines have used lumps of fragile material, which is material from the

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Role is brought forward and adjusted across a support that forms a focal plane. The exposed web material is subsequently conveyed to a cutter against the developing unit, wherein one is severed from the web Length is machined or developed and delivered by the machine.

The drive mechanism for the rollers and the separation mechanism

nism to produce this result require costly Parts because of the precision that is required on the parts to properly convey and control the web from the Supply roll to the cup level to control and drive the web from the cup level past the separating device and to ensure conveyance of the severed sheet to the developer.

Applicants have replaced a sheet feed system for the web feed and cutting system of the earlier devices. In particular however, they have developed a novel sheet feed mechanism to replace the web feed mechanism, whichever sheet conveying mechanism is simplified and accurate does not require a carefully designed drive system and combined with the sheet conveying system the sheet drive and sheet support at a cup level to the exposure the same for the production of a copy of the photographic image from the microfilm.

According to the invention is a microfilm reading and copying machine created, which has a light source, a support for a microfilm, a projection system, a rear Projection screen, mirror to direct an image onto this screen, a support for a pile of sensitive made sheet material, plates that have an exposure plane

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form, a developer to develop "the sensitive made materials and a drive to make the sensitive ^ ' made material to the exposure plane from the material stack to convey and wherein these means for conveying the sensitized sheet material to the exposure plane, the sequential conveyance and separation of the the top sheet in a stack. The sheet dispensing mechanism includes a pivot support for a stack of sheets of material, a foam-covered dispensing roller that engages is set with the top sheet in the stack, as well as guide means showing a discharged and separated Sheet into position over the stack upon rotation of the dispensing roller judge (I.

The invention will be more complete from the description below in connection with the drawings understandable, in which are:

Fig. 1 is a schematic, vertical sectional view of a Microfilm reading and copying device, which is constructed according to the invention,

Fig. 2 is a perspective view of the sheet dispensing mechanism of the reader-copier according to Fig. 1, wherein the sheet guide and erag elements are removed,

Fig. 5 is an enlarged partial sectional view showing ^ the! fuel elements of the leaf dispensing mechanism explained, *

Fig. 4 is a vertical sectional view of the sheet delivery mechanism in an operating position of the same,

Fig. 5 is a vertical sectional view of the sheet dispensing mechanism in a second operating position and

Fig. 6 is an enlarged partial sectional view showing a second embodiment of the sheet separating and conveying mechanism represents

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In the drawings, a microfilm reading / copying machine according to the invention is shown, which is a projection system for projecting a light image contains which system includes a light source 11, a microfilm support 12, and a lens tube 14. The light image can be directed to a rear projection screen 10, which has dimensions of at least 20 cm by 20 cm by a pair Mirrors 16 and 17 or against a support plate 20 for supporting a sheet of sensitized material of at least 20 cm by 20 cm, to expose the sheet through the image. A developer 22 for developing the exposed photosensitive The sheet after exposure is disposed adjacent to the platen 20. The reader-copier further includes a copy sheet discharge mechanism 21 to advance a photosensitive sheet to the exposure plane from a sheet supply. Of the Copy sheet delivery mechanism 21 includes a pivoting carriage 44 for a stack of sheet material 38, a pair of foam-covered discharge rollers 50 and 51 for engagement with the top sheet in FIG the stack 38, a guide 75 'around a dispensed sheet into a position on the support plate 20 upon rotation of the dispensing rollers 50 and 51 and a pair of dividers 80 and 81 which prevent more than one sheet from being discharged from the stack 38 when the rollers 50 and 51 are rotated.

In Pig. 1 shows a microfilm reading / copying machine which offers the user an opportunity to use a rear projection screen to see 10 light images, generated by a light source 11 and a microfilm set on a support 12 · The light image is focused through a projection lens that is in a floating lens tube 14 is mounted showing the image of the film to a first mirror 16 on a movably mounted second mirror 17, which the same to the Rear of the screen 10 directs

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If desired, a visible copy of the photograph to generate or an enlarged print of the graphic Information on the microfilm, the operator adjusts the second mirror 17 from the normal or first position, which is shown in solid lines in Mg x 1, in the second position, which is shown in dashed lines. This forms a second light path, which the light image from the microfilm to the first mirror 16 and from there at a support plate 20 The support plate 20 forms a link of a copy sheet delivery mechanism 21, which is a sheet of photosensitive material in a Position in order to receive the photograph and thereby exposed. to become laughing exposure becomes the most photosensitive Sheet is conveyed to a developer 22, wherein the photo is developed into a visible shape on the copy sheet and the copy sheet from a chute 24 at the front end the system is delivered.

In the normal position of the unit with the mirror 17 in the position as shown in full lines inFig.1, an on-off switch is operable to energize a lamp 25 in the light source 11, which lamp is in series with a Switch 26 is connected, which is attached to one end of a guide 27 »the support 27 forms; A guide for a slide 28, with which the mirror is pivotably connected on an axis 29. Drive means are provided to move the carriage; to be moved along the guide 27 and as shown, the drive means are in the form of a manually operable arm 30 which extends from the carriage 28 forwards out of the reader-copier, where it terminates in a handle 31. Vleiia. if it is desired to produce a pressure, the operator grabs the handle 31, pulls it out of the position in the extended position.

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Solid lines in the position in dashed lines, wherein the carriage 28 moves along the length of the guide 27 and wherein the switch 26 opens and the light source 11 goes out. Since the lower part of the mirror 17, as shown in FIG. 1, engages a stationary stop member 32 which has a nose surface 34, the mirror 17 is pivoted about the axis 29 into the vertical dashed line position. In this position, the carriage 28 engages a normally open third switch 35 which is connected to the lamp 25. Closure of switch 35 directs power to lamp 25 in light source 11 through a suitable timer, not shown, connected in series therewith. When the timer is actuated, it opens the circuit to the lamp through switch 35 and lamp 25 goes out. Thus, the image from the microfilm has been properly directed to expose a sheet of photosensitive material carried on the support plate 20. An indicator 20 will indicate to the operator that the exposure is complete and he can again grasp the handle 31 moving it from the dashed position to the solid line position, the carriage 28 returning to the position with the switch 26 closes.

The movement of the carriage 28 along the guide 27 not only moves the mirror 17 out of the light path, with the exposure of the photosensitive sheet, but also transmits a driving force through a cable 36 to the Sheet Dispensing Mechanism 21.

The sheet dispensing mechanism 21 includes a frame having parallel side walls 40 and 41 spaced apart transversely having. Extending transversely and disposed between the side walls is a pivotably mounted support member 44 for receiving and supporting a stack 38 of

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sensitive, made sheet material * The support member 4-4 is pivotable at one end between the side walls 40 and 41 on pins 4-5, one of which is shown in Figs. 4-5 , for movement about an axis parallel to the axis of the shaft 49 . The support member has an over wall, a sod wall, transversely spaced side walls, and an end wall which end wall is adjacent to the pivot pins JfT. The top wall of the support member 44 is formed adjacent at one end with spaced cut-out corner portions which expose the sheet material in the stack 38. M.

Extending transversely from the frame and in the side walls 40 and 41, there is a shaft 49. The shaft 49 carries a pair of foam-covered sheet dispensing rollers $ 50 and $ 51 which are attached to it for rotation with shaft 49. At At one end, the WeIXü 49 extends over the side wall 41 and is connected to a one-way clutch 52. Like it As is conventional, one half of the coupling 52 is on the shaft 49 attached and the other end is attached to a drive link, e.g., the pulley 54, the two halves being held in engagement by a spring.

Between the side walls 40 and 41 also extends a * fixed rod 55 carrying a cable pulley 56. Arranged around the pulley 5.6 and at one end on the Attached to the top wall of the support member 44 is a cable 57> the other end of which has a tension spring 58 »Das other end of the peder 58 is through a cable 59 with a eccentric hub 60 connected, which is mounted on a second transverse rotatable shaft 61, the one Part of a drive device for the sheet delivery mechanism 21 forms.

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The rotatable shaft 61 is journalled in the side walls 40 and 41 and carries a pulley at each end thereof. A first pulley 62 receives the drive cable 36, which is attached to the carriage 28, to the sheet dispensing mechanism 21 to drive. A pulley 64 arranged at the other end of the shaft 61 is, drives a cable 65, which is wrapped around the pulley 54, around the shaft 49 through the override clutch 52 drive

The shaft 61 has a pair of transversely spaced foam covers Sheet feed rollers 66 and 67 attached thereto between walls 40 and 41. Arranged adjacent to the inner surface of each of these sheet feed rollers 66 and 67 there is a radial cam 691 which is attached to the shaft 61.

Above the shafts 49 and 61 there is a paper guide frame which has a support plate 20 which determines the focal plane that carries the photosensitive paper * This paper guide frame is mounted for pivoting movement about the axis of the shaft 49 and extends across the frame, ending above the sheet developer 22. The paper support plate 20 has at one end above the Shaft 49 has a deflected end which extends radially inwardly from the outer peripheral surface of rollers 50 and extends. Directly above each of the rollers 66 and 67 there is an opening in the support plate 20, which it the periphery of rollers 66 and 67 allows a piece of sheet material placed thereon to be reached. The openings extend

but not to a position above crouching 69. At that opposite end is the support plate 20 with tiner 90 ° bend formed to direct the exposed sheet material to the developer 22

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. ■■■ '■ "■■■ - .." ". ■■■■■ -In Distance relationship over the support plate 20 and a Forming part of the guide frame, there is one guide plate 74. The guide plate 74 is at one end with. a curved end portion 75 is formed which forms a guide around the rollers 50 and 51, which the outer circumference of the rollers touches or close to it in the Is spaced, namely on surfaces between 90 and 180 °, around its circumference, to a continued driving force to bid on a sheet of material »in Fig. 3 corresponds the curve in the end portion 75 is substantially the circumference of rollers 50 and 51 and is arranged around the rollers » The central portion of the planar surface of the plate 74 across the main part of the plate 20 is enlarged with a strand right-angled opening 76, which through it the plate or a piece of sheet material placed thereon exposed. The opening 76 is at the front end * the unit provided with an Elanseh 77 to'die leading edge of sheet material between plates 74 and 20 To guide, the front end of the opening 76 essentially ends directly above the axis of shaft 61. The front end of the plate 74 maintains a spaced relationship with plate 20 by means of suitable spacers and is provided with a bend, which directs the copy sheet into developer 22.

In the embodiment shown in FIGS. 1-5, the leaves are in the single stack ¹ u £ d successively fed from the stack "To this easily, cheaply and reliably execute, is disposed parallel to and adjacent to the shaft 49 is a rod, adjustably attached to the walls 40 and 41. The rod 79 supports a pair of irons 80 and 81. As shown, each of the separators 80 and 81 has a convex surface disposed adjacent the periphery of each of the rollers 50 and 51.

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The shaft 49 and the separators 80 and 81 are arranged so that they are adjacent to one end of a stack of sheet material 38.

In Fig. 3, the operation of the delivery rollers 50 and 51 and the short separators 80 and 81 is shown. As shown, the dispensing roller 50 is positioned over one end of the stack of sheets of material supported in the support 44. The rotation of the roller 50 in the clockwise direction, as in FIG. 3, a top sheet 82 of the stack 38 causes the foam coating on the roller 50 to force it against the separator 80. Because of the friction between the sheets, the second sheet 83 and others can possibly be advanced with the top sheet 82 as shown. The separator 80 has its upper convex surface in contact with the periphery of the surface of the roller 50, and preferably the separator 80 compresses the discharge roller 50 slightly. As the roller 50 advances the sheet 82, the sheet 83 may contact the separator 80 The peripheral surface of the roller 50 has a high coefficient of friction with the sheet material so that when the roller 50 is brought into contact with the sheet material stack 38 and rotated, the roller 50 easily removes the sheet 82 from the stack The separator 80 has a coefficient of friction with the sheet material that is less than that between the surface on the roller 50 and the sheet material, but greater than the coefficient of friction between the sheet 82 and the second sheet 83, such that the sheets 82 and 83 are separated when the sheet 83 contacts the stationary separator 80. Because the roller 50 has a higher coefficient of friction with the sheet material than the separator 80, the sheet 82 will be moved by the roller 50 over the element 80 and

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the coating on roller 50 will be compressed, to move the sheet 82 between the roller 50 and the separator 80 'and into the curved end portion 75 of the guide plate 74. The. Guide plate ■■ 74 creates a limited Path for the sheet, the same being set on the support plate in the cup level as the roller 50 continues to rotate and the sheet 82 through the guide drives. .

In operation, the read / copy device is in its normal position as shown in Fig. 1, where the sheet material support member 44 of the sheet dispensing mechanism 21 is in the position shown in FIG. In this position, the spring 58 is expanded and under Tension, lifting the sheet material support member 44, and the stack of sheet material 38 into the fixed frictional connection with the circumference of the rollers 50 and 51 brings. When the user takes a microfilm image in the optical axis of the projection system has been arranged and centered the same on the rear projection screen 10 for his visible examination will be centered. When a pressure or a copy is desired, he grips the handle and pulls the carriage 28 forward, opening the switch 26 and cutting off the power to the lamp 25 will. When the carriage 28 moves forward along the guide 27 he pulls on the cable 36 to the Rotate pulley 62 counterclockwise, like is shown in Figures 1 and 2. This will make the Pulley 64 driven in the opposite clockwise direction and the pulley 54 in a clockwise direction. In this direction of movement, the coupling 52 drives the shaft 49, and the rollers 50, 51 rotate clockwise, like Figures 4 and 5 show the top sheet 82 of d ^ ai stack 38 moves into guide 75. The rotation

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the pulley 62 in the opposite clockwise direction rotates the Shaft.61 and the hub 60 counterclockwise, releasing the tension on the spring 58, which they caused "to contract after a predetermined angular movement of the sheet delivery rollers 50 and 51 and the hub 60.

After the spring 58 contracts, the stack of sheet material 38 and support 44 become on the dispensing rollers 50 and 51 in the in RLg. 5 position shown moved * However, this will not happen until the above Sheet driven from the stack and separated and moved into the guide where the paper is against the arcuate Part 75 is held by rollers 50 and 51 and driven between plate 74 and plate 20. If the carriage 28 approaches the front end of the guide 27, the mirror 17 is tilted into a position in the is generally normal to the guide 27 as indicated by the dashed lines. Also have themselves in this position the cams 69 are rotated approximately 360 ° in such a way that the cams cover the lower surface of the plate 20 hits, lifting the guide member, allowing the gate edge of sheet 82, from the upper one Tangential edge of rollers 50 and 51 in one position to be advanced beyond the upper tangent point of the conveyor rollers 66 and 67 · The distance between the axis of rollers 50 and 51 and the axis of rollers 66 and 67 is shorter than the length of the sheet material. The blade is now in position generally parallel and coextensive or in an overlapping position to the support 44, and continued movement through roller 50 does not move the trailing edge of the sheet past the point of tangency the roller 50 and the cam 69 move sioh from below the frame 20, with the gate edge of the sheet material

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is allowed between the plate .74 and the upper! parts of rollers 66 and 67 to come. The carriage 28 closes also the switch 35 »whereby the lamp 25 in the light source is energized, and wherein the timing device is energized and an image is projected onto the sheet material on the cup plane which is supported by the support plate "20 is determined. When the time on the timer has run out is, the lamp 25 is extinguished and an indicator indicates this to the operator. The operator can then Return the handle 31 to the normal position. In this embodiment, the carriage 28 moves the cable 36 in the opposite direction, with pulley 62 and pulley 64- as well as the rollers 66 and 67 are driven clockwise in such a way that that the sheet is advanced between the plates 20 and 74 into the developer 22. The discharge rollers 50 and 51 become not rotated because the one-way clutch 52 slips.

The developer 22 is a shortage heat developing unit with a preset thermostat and the one floating heater shoe 84, which is pressed against a soft surface roller 85 which is rotated by an electric motor not shown. This roller 85 is continuously rotated and the heater is continuously operated when the reading-copying machine is switched on. Along one side of the roller 85 where the sheet material is directed from the plates 20 and 74 there is an entry port, and the roller will bring the sheet forward around the heated shoe, to develop the sheet material. If the sheet is the If it leaves the nip between the roller and the shoe, it is fed into the outlet shaft through IHihrungsglieder 86 and 87 24 directed.

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When rollers 66 and 67 drive the sheet against developer 22, roller 85 will pick it up. To that Again, to prevent wrinkling, the cams 69 move under and raise the platen 20 around the sheet material from a driving force after being conveyed to the developer 22 for the predetermined length is to be absorbed by it.

The rollers 50, 51, 66 and 67 are preferably covered with about 0.3 cm of polyester foam, for example a soft closed one ss-cell polyester foam with an open-pored, irregular surface with a density of 240 kilograms per cubic meter.

The separators 80 and 81 are formed from an elastomer, such as a urethane of about 80 durometers by pressing to provide a glossy surface.

In Pig. 6, a sheet dispenser is shown having a fixed (except when loading) support member 90 for has a stack 91 of sheet material. Across one end of the stack of sheets is a shaft 92 which α carries thereon spaced delivery rollers 93. The rollers 93 may, for example, be an outer tire or a coating about 1.9 cm thick of a low density closed-cell foam, e.g. 80 kilograms per cubic meter of urethane, which is resilient and compressible is. Arranged around the roller 93 is an arcuate guide member 94 which supports the roller 93 touches at points between 90 and 180 ° in order to interact with the rollers for the purpose of guiding and driving successive leaves of sensitized

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Material between the morring plates 95 and 96 · Die Fixed position of the support 90 and the shaft 92 remain constant, but the resilience and compressibility the foam coating keeps the outer surface of the rollers in contact with the top sheet in the stack, to convey it away from the stack and around the guide 94. The shaft 92 would go in only one direction driven as is the shaft 49 in the device after Pig. 3 was. The separation of the sheets is by perforation of the stack of sheets of material at the opposite end of the stack with a thin pen 98. A thin one Holder can be drilled into the stack to receive the pin. When roller 93 drives the top sheet, it is torn from the pen, but the pen holds it remaining sheets in the stack.

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Claims (1)

Machine with a sheet delivery mechanism (21), characterized by a support (44 »90) for supporting a material sheet (38, 91)» a rotatable delivery roller (50, 93) »which is arranged above the support (44, 90) to be adjusted to engage a top sheet (82) of material in the stack (38,91) »adjacent one end thereof, the peripheral surface of the dispensing roller (50» 93) having a high coefficient of friction with the sheet material, which provides movement of the top sheet (82) upon engagement therewith and upon rotation of the roller (50, 93), and characterized in that a guide member (75 »94) is disposed around the delivery roller (50, 93) and the same touched in circumferentially spaced locations to each sheet, as it is pulled from the stack (38, 91) around the delivery roller (50, 93) in a position generally parallel with the support (44 »90) to judge. Machine according to claim 1, characterized in that the delivery roller (50, 93) is covered with resilient, compressible foam to adapt to a stack of material sheets (38, 91) and that the axis of the delivery roller (50, 93) is relative to the support ( 44 »90) is fixed during operation of the mechanism in order to convey successively sheets from the stack (38, 91) one by one to the guide member (75» 94). A machine according to claim 1, characterized in that the machine includes a separator (80) set adjacent one end of a stack (38), the separator (80) having a convex surface in adjacent position and below the axis Dispenser - 17 109850/0376 201472Λ roller (50), the surface being generally parallel to the axis of the dispenser roller (50) and the separator (80) having a coefficient of friction with the sheet material less than that of the dispenser roller (50), wherein said coefficient of friction of the separation element ■ (80) exceeds the coefficient of friction between separate sheets of the sheet material to be conveyed, whereby the discharge roller (50) can drive one or more sheets of K material from the stack (38) against the separation element (BO), and on contact of the sheets other than the top sheet (82), the element (80) separates the sheets so that only the top sheet (82) is allowed This is done »to pass between the delivery roller (50) and the separating element (80) · 4 · Machine according to claim 1, characterized in that the support (44) is mounted pivotably for movement relative to the delivery roller (50) and the delivery mechanism (21 ) includes means for urging the support (44) against the delivery roller (50) if a sheet is to be separated from a stack (38) thereof, and for moving the support (44) away from the delivery roller (50) after rotation * same by a predetermined arcuate extent. ". ■ \: - ■■ '■■"} ■ / ■ V ■ ■' ■■■■ '■'. '■. ■. ; ■■ ■ '"■ 5. Machine according to claim 2, characterized in that the guide member (74, 20, 95, 96) defines a sheet support (20, 95) which is arranged generally parallel to the support (44) , in such a way that a sheet driven by the stack (38) is moved into a position, generally parallel to the stack (38). 6. Machine according to claim 4, characterized in that the guide member (75) has a Has arc-shaped path which is essentially identical to the delivery roller (50) and is in contact with this roller (50)., "18 ~ Y ORIG / NAL 2.0U724 7. Maaohine according to claim 5" characterized in that a drive is provided to drive the delivery roller (50) in one direction and that this drive includes said means for moving the support (44). 8. Masohine according to claim 7, characterized in that the guide member (74) includes spaced plates (74, 20) to set a sheet therebetween and that the machine includes a feed roller (66) which is driven by the delivery roller (50) stands at a distance for movement through an opening in one of the plates (20) in order to touch a sheet and convey the same between the plates (74 »20). A machine according to claim 8, characterized in that the machine is a microfilm reader-copier and further includes a light source (11), a support (12) for a microfilm, an execution to direct the light through the microfilm and for projecting a light image therefrom, a rear projection screen (10) for viewing the image, an exposure plane defined by the plates (20 and 74) for setting a sensitized coating on the sheets for exposure to the light image, and one Developer (22) for developing the sensitized sheets and wherein the dispensing roller (50) contacts the uncoated side of a sheet on the stack (38) and reverses a sheet from the stack (38) to convert the sensitized coating on the sheet into one to bring exposed position between the sheets (20, 74). 10 · Reading and copying device according to claim 9, characterized in that the rear projection screen (10) is at least 20 nm χ 20 am and the sheet material is at least 20 cm ι 20 cm in size and in which the delivery roller (50) 109850/0376 - 19 - ORiGiNAL INSPECTED is formed from a closed-cell polymeric foam material with an open-pored irregular surface 11. A reader / copier according to claim 9, characterized in that the machine includes a movable mirror (17) having a first position around the To direct the light image onto the rear projection screen (10), as well as a second position, which allows the light image to be directed onto the exposure plane (74 »20), a manual drive connected to the mirror (17) around the same the first position to the second position and back to the first position, and wherein the drive for the delivery roller (50) is actuated by the hand-operated drive for the mirror (17) is igt when the mirror (i7) is moved to the second position. ■ - ".-." 1.09850 / 0376