US2225421A - Duplicating device - Google Patents

Description

A. MARCHI-:v

DUPLICATING DEVICE Filed April 15, 1958 v1: SheetS--Sheel 1 Def- 17 1940- A.l MARcl-{Ev 2,225,421

- DUPLIQATING Dvicg.

Filed April 15, 195e 4 sheets-sheet 2 A. MARCHEV DUPLICATING DEVICE l Dec. 17, 1946.

FiledApril 15, 195e 4 sheets-snee; 4

Pr 1 fill f.. IM.

Z w l Patented Dec. 17, 1940 UNITED STATES PATENT oFFlcE nurucarmo DEVICE f West Virginia Application April 15, 193s, serial No. 202,219

Claims.

The invention relates to duplicating devices and is particularly adapted to be embodied in duplicating machines of the type wherein copy sheets moistened with a solvent for carbon or 5 ink are brought into contact with a master sheet upon which the data to be duplicated appears in reverse, the result being that the data is duplicated in positive upon the copy sheets.

An object of the invention is to provide improved means in a duplicating machine of the kind described for moistening the copy sheets with a solvent.

Another object of the invention is to provide improved moistening means of the kind described which may bev adjusted quickly -and eas-v ily to control the amount of solvent applied to the copy sheets.

Other objects and advantages will become apparent as the following detailed description progresses, reference being had to the accompanying drawings, wherein- Fig. 1 is a longitudinal vertical section taken through a duplicating machine which comprises apparatus embodying the invention.

taken on line 2--2 of Fig. 1.

Fig. 3 is a section taken on line 3--3 of Fig. 2.

Fig. 4 is a section taken on line I-l of Fig. 2.

Fig. 5 is a section, partly broken away, taken on line 5 5 of Fig. 4.

Fig. 6 is a fragmentary plan view of apparatus shown in Fig. 5.

Fig. 7 is a fragmentary plan section taken on line 1-1 of Fig. 5.

Fig. 8 is `a fragmentary section taken on the same line as Fig. 7 but showing certain parts in changed positions.

Fig. 9 is an enlarged fragmentary section takn on line 9-9 of Fig. 3.

Fig. 10 is a section takenon line Ill-I0 of Fig. 2.

Fig. 11 is a plan section taken through duplicating apparatus which embodies another form of the invention. A

Fig. 12 is a vertical section taken on line I2-I2 of Fig. 11. I

Fig. 13 is a fragmentary section taken on line I3-I3 of Fig. 12.

Fig. 14 is a fragmentary section taken on the same line as Fig. 13 but showing certain parts in changed positions, and

Fig. 15 is a fragmentary section taken on line I5-I5 of Fig. 12.

Referring now to the drawings and more particularly to Figs. 1 to 10, inclusive, wherein` a Fig. 2 is a plan section, partly broken away,4

(Cl. ill-48) duplicating machine embodying a preferred form of the invention is illustrated, the reference character I0 designates generally the frame of the machine which comprises two upright side frames II and I2 (Figs. 1 and 2). Rotatably mounted between the side frames I I and I2 is a duplicating drum I3 which has a platen roller I Il co-operating with it, the platen roller I4 being adapted to press copy sheets against a master sheet (not shown) carried by the duplicating drum. The master sheet is usually a sheet of paper upon which the data to be duplicated is typewritten or printed in reverse so that when copy sheets are pressed against it, the data will appear in positive upon the copy sheets. Each copy sheet is moistenedwith a solvent for the carbon or ink on the master sheet before it is advanced into contact with the master sheet. This method of duplicating is now lwell known in the art.

As best shown in Fig. 1, the improved machine preferably comprises a table I5 upon which copy sheets may be stacked and may be advanced one y by one manually to the bight-between two combined feeding and moistening rollers I6 and I1 i Fig. 3). The moistening roller I6 is preferably formed from non-absorbent material such as rubber and is preferably mounted on a shaft f I8 which is rotatably journalled in the frame I0. The cio-operating roller I1 is preferably formed from absorbent material such as felt or felt impregnated with latex, the roller I1 being mounted'upon a shaft I9 .which is rotatably journalled in bearing devices 20 carried by levers 2| which are pivoted upon a shaft 22 mounted in the frame I0 (Fig. 1). Springs 24 urge the levers 2l in a counter-clockwise direction (Fig. 1) to hold the roller I1 against the roller I6.

A crank arm (not shown) is fixed to a shaft 25 rotatably journaled in the side frame I2. A pinion 26 fixed to the shaft 25 meshes with a gear 21 with which the drum I3 is constrained Y to rotate. A larger gear 28 also constrained to rotate with the gear 21 meshes with a pinion 3I'I which, in turn, meshes with a pinion 3l. The, pinion 3| is fixed to the shaft IB. Obviously, when the crank arm (not shown) Yis rotated, the ydrum I3 is rotated and the roller I6 rotates in unison therewith and drives the roller i1 so that a copy sheet previously advanced to the bight between the rollers I6 and I 1 will be advanced to the bight between the drum I3 and the platen roller and they will advance it and discharge it upon a tray 33 mounted between the side frames II and I2. During the time the copy sheet the lower end of the felt strip 36being in contact with the roller `I8 and also in contact with a portion of the felt strip 31 projecting from a contalner which is designated generally by the reterence character 38. The container 38 comprises front and back walls 48 and 4I, respectively, an inclined bottom wall 42 and end walls 43 and 44 (Figs. 2, 3 and 4). The upper end of the container 38 is normally closed by a Hcover 45` pivoted adjacent the wall 48. It will be noted `that the feltstrip 38 is clampedbetween a plate f 41 andthe outer surface oi the front wall 48, the plate 41 being adjustably secured .to the wall 48 by means comprising screws 48. The wail l48 isslotted as at 58 so that the felt strip 31 may project therethrough. Means hereinafter dei scribed supply solvent to the inner end of the felt strip 3.1 and the solvent passes through the strip 31 to `the strip36 which distributes the solvent upon the roller |8.

The means for mounting the container 38 are shown andfdescribed in the co-pending application Serial No. 58,522 filed by Stephen Kokay January 10, 1986 and .therefore need only be described'briey, in the present application.

, The container 381s 'mounted preferably, so

` that it is yleldingly urged toward the` roller I6 I a stub`8'3. carried by the sideframe I2. At the at all times to hold the lower end of the` felt strip 38 in contact with that roller. `As best shown in Fig. 2, one end of the container 38 is` provided with'a pin 82 which is journalled in one end of other end of the container 38 a plate54 is mounted by means oi" a rivet 55 and a combined rivet and bearing memberv` 56,'the longitudinal axis of the bearing member 58 being co-incident with the longitudlnalaxis of the pin 52. The bearing member 58 is pivoted in one end of a stud 58 projecting from the side frame II. Means com-` prising a spring 58 yieldingly urgesthe plate 54 and the container 38 in a counter-.clockwise direction (Fig. 3) around the co-incident axes of the pin 52 and the bearing member 58.

Disposed within the container 38 and fixed to the inner surface of the wall 4I thereof is a valve casing 88 (Figs. 4, 5 and 9). A valve member 8| having a slot 82 therein is rotatably Journalled in the casing 68. The valve member 8| has a stem` 83 of reduced diameter journalled in the wall 4|. the stem 83having a slot whichmay be engaged by a screw driver when the valve member 3| is to be adjusted by rotating it in one direction or the other. The bore in the wall 4I accommodating the stem 83 is normally closed by a plate 84 which is secured detachably `to the wall 4| by screws 85. y The valve memberV 8| is provided with a second stem 81 whichhas ahead 68 at its outer end. A compression spring 18 disposed aroundthe stem 81 and interposed between the head 88 and thevalve casing G8 will hold the valve member 8|' in its adjusted posi- `vided with a horizontally extending bore 12 tions.

In its upper end, the valve casing 88 is prowhich is closed at one end. The bore 12 normally communicates with the slot 62 through two holes 13 and 14 in the valve casing 68. A metallic tube 16 is disposed in and projects from `the bore 12 and is closed at its inner end. The tube 16 has an aperture 18 through which solvent may flow into the bore 12 and thence through the holes 13 and 14 to the slot 52. Secured to the outer endV of. the tube 18 is a flexible tube 88 which is preferably formed from rubber. The tube 18 communicates with a metallic tube 82 through the tube 88, the tube 82 being mounted in the end wall 44 of the container 38 (Fig. 5).` One end of a flexible tube 83 is secured to the outer end ofthe tubel2, the other end of the tube 83 being connected to` a valve casing `84 which holds a cheek valve which is designated generally by thereference character 85 (Fig. l). A tube 88 leads from the` valve casing to a pump mechanism which isdesignated generally by the refer- 'ence character 81. `The pump mechanism 81 extends through atanlr` or receptacle 88 adapted to hold a supply of solvent. Obviously, the pump is adapted `to deliver solvent from the tank 88 throughthe check valve 85 'and `the tube 83 to the tube 88 which discharges it into the bore n The `valve casing 88 is provided in its lower end with two opposed `bores 88 and 8| which are separated by a partition wall 82 forming part of the casing I8. Projecting into the bores 88 and' 8| are metallic tubes 88 and 84, respectively. Holes 88 and 81 formed in the casing 8l are adapted to discharge solvent from the slot 82 into the tubes 83 arid 84, respectively. 0bviously, the valve member 8| may be rotated into a position wherein it will close the holes 13 and 81 so that the solvent will pass through the holes I4 and 8l to deliver `the solvent to the tube 83. It is also obvious that the valve member 6| may be adjusted so that all.of the solvent is discharged into the tube `84. Slidably iournalled on the tubes 83 'andi84 are tubes |88 and |8| which are provided with iianges |82 and |83,

respectively,iat their outer ends, their inner ends being secured in plates` |84 and |88, respectively, (Fig. It will be noted that the ends of the tubes 83 and 84 are closed by plugs |88 and that screws 8 `screw-threaded into the plugs |88 secure the outer ends of the tubes 83 and 84 to the end` wallsfof the container 38. Disposed around the outer` ends of the tubes 83 and 84 are compressionsprings Il! which yieldin'gly urge the tubes `|l|8 and |8| toward each other so that the plates |84 and |83 are urged against a cam ||4 iixed to a pin Ill rotatably journalled in a lug Ill 'formed integral with the casing 88 (Figs. 4 and 5). Rigidly secured to the pin ||8 is a lever ||l whereby the pin `Ill may be rotated to displacethe cam ||4 angularly. The lever III has a point |I8 which cci-operates with a scale |28 on the upper faceof the lug IIB. It will be readily understood that when the lever III is displaced angularly to displace the cam ||4 fromthe position wherein itis shown in Fig. 7 to the position `wherein it is shown in Fig. 8, the tubes |88 and I8I will be displaced equal distances in directions away from each other, this movement `being against the action of the springs ||2.

YThe tubes 813 and 34 are provided with apertures |22 `and the tubes |88 and I8| are provided with apertures |23 which are aligned with the apertures |22 when the cam ||4 is in the position wherein it is shown in Fig. `'1. If the cam is then Vdisplaced into the position wherein .it isshown in Fig. 8, the apertures |23 will be displaced with respect' to the apertures |22 so that the tubes and |0| will partially close the apertures |22 and a smaller amount of solvent will be discharged through the apertures |22. Obviously, if the cam H4 is displaced further so that it occupies a position at 90 degrees to the position wherein it is shown in Fig. 7, 0 the apertures |23 willy be brought entirely out of registry with the apertures |22 and the tubes |00 and.|0| will close the apertures |22 so that no solvent will iiow through them.

Solvent which is discharged into the container 5 38 through the apertures |22 and |23 falls upon the inner end of the felt strip 31 and iiows through the strip 31 and the lower end of the strip to the roller I6. The supply of solvent to the tube 93 may be cut off by adjusting the L0 valve member 6| and likewise the valve member 6| may be adjusted tocut off the supply of solvent to the tube 94. This is advantageous in the event narrow copy sheets are to be advanced through the machineI and it is only necessary to moisten one end or the other end of the moistening roller |6. Assuming that the valve member 6| is in the position wherein it is shown in Fig. 9 and that the apertures |22 and |23 are aligned as illustrated in Fig. 7, it is apparent u) that ii too much solvent is being supplied to the roller i8, the cam ||4 may be angularly displaced to partially close the apertures .|22 so that a smaller amount of solvent will drop upon the felt strip 31 and therefore a smaller amount 5 of solvent will be delivered to the roller I8.

Therefore, the operator may at all times con- 'trol the amount oi solvent applied to the copy sheets 35.

In Figs. 11 to 15, inclusive, I have shown a 40 moistening mechanism which embodies another form of the invention and. which may be substituted for the moistenlng mechanism shown in Figs. 1 to 10, inclusive, if it is so desired. The moistening mechanism shown in Figs. 11 to 15, inclusive, preferably comprises a container 38h which is identical in construction with the container 38 and is mounted by the same mechanism between the side frames and I2, it being assumed that the moistening means shown in Figs. 11 to 15, inclusive, has been substituted for the previously described mechanism in the duplicating machine shown in Fig. 1. Projecting through a slot 50h provided in the container 38h is a felt strip or wick 31h which is practically identical with the felt strip 31 andccoperates with a felt strip 36h which corresponds to the felt strip 36. The lower end of the felt strip 36h is adapted to contact the uppermost feeding 'roller I6 so that this roller will be supplied with solvent and apply it to the copy sheets as they pass between the rollers I6 and |1. It will be understood that the container 38h is urged yieldingly by a spring 59h in a direction to have the strip 36h urged against the roller IB.

Disposed within the container 38b is a valve casing 60D which is identical in construction with the valve casing 60 except for the fact that it is not provided with a lug corresponding to the lug, IIB. The valve casing 60h is provided with To the same passages, bores, etc. as the valve casing 60 and has mechanism therein which may be adjusted to control the amount of solvent which will be delivered to tubes |93 and |94. The solvent is' supplied to the valve casing 60h by 75 means comprising a metallic tube B2b and a exible tube 80h which correspond to the metallic tube 82 and the iiexible tube 80, respectively, the tube B2b being connected to the pump 31 by the tube 83. It will-be noted that the outer ends of the tubes |93 and |94 are closed 5 by plugs |09b and that screws ||0b screw-y threaded into the plugs |09b secure the outer ends of the tubes |93 and |94 to the end Walls of the container 38h. Y

The tubes |93 and |94 are preferably provided i0 with a plurality of small apertures |22b which are preferably equidistantly spaced. Disposed around the outer ends of the tubes |93 and |94 and pivotally mounted thereon are sleeves 200 which have lugs 20| fixed thereto, the free ends l5 of the lugs 20| being pointed as at 202 so as to be engageable in notches 203 provided in the comb-like member 204 disposed in the container 38h against the inner side of thewall 4017 which corresponds to the wall 40 described above. As 20 best shown in Figs. 13 and 14, the sleeves 200 are provided with apertures 2|0, 2| 2|2, 2|3 and 2|4. In Fig. 13, the sleeve 200 is shown in a position wherein each of the apertures 2|0 to 2| 4, inclusive, registers with one of theapertures |22b so 25 that the solvent may ow from the tube |93 through the apertures 2|0 to 2|4, inclusive, and drop upon the felt strip 3119 However, the sleeve 200 shown in Fig. 13 may be moved to the right (Figs. 13 and 14) a distance equal the-distance 30 between adjacentI slots 203, whereupon the aperture 2|0 will be brought out of alignment with the corresponding aperture |2212 and no solvent will iiow through that aperture to drop upon the feit strip 31h. in Fig. 14 the Sieeve 20o has been 35 shifted the distance between two of the notches 203v so that the first two apertures |22b at the left end of the tube |93 have been closed. It'will be readily understood that one may continue to shift the sleeve 200 to the right until the rst 40 ve apertures |22b at the left-hand end (Fig. 14)

of the tube |93 have been closed. vOf course, the corresponding sleeve 200 on the tube |94 may be adjusted in the same manner.

With such construction it will be readily un- 45 derstood that one may narrow the distance over which solvent is applied to the felt strip 31h so that if narrow copy sheets are being advanced through the duplicating machine very little, if any, solvent will be applied to the ends of the 50 roller I6.

'As best shown in Figs. 11 and 12, compression springs 220 xed to the lugs 20| urge the pointed ends 202 of the lugs into the slots 203. However, the operator may readily lift the lugs out of the 55 slots against the action of the springs when the apparatus is to be adjusted.

While the preferred embodiment of the invention has been shown and described, it is to be understood that it is capable of many modifica- 60 tions. Changesytherefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims. in which it' is the intention to claim all novelty inherent in 65 the invention as broadly as possible in view of the prior art.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is: l

l. In a solvent feeding means for a duplicating machine, the combination of an elongated container having an opening through its Wall through which an absorbent pad extends, tube means carried by said,containerA longitudinally thereof having perforations at intervals therealong in position to spray solvent upon said pad, means for feeding solvent under pressure to said tube means, otherk ,tubular members `slidably -mounted on opposite end' portions of said firstthrough which an absorbent padeextends, tube means carried by said container longitudinally thereof having perforations at intervals therealong in position to spray solvent upon said pad,

' means for feeding solventunder pressure to said tubeV means, other'` tubular members slidably mounted on opposite end portions of said first.-

namedtube means having perfor-ations movable into and out of registration with the perfor-ations* in said iirstnamed`tube means for controlling the escape of solvent therefrom, spring means normally pressing said second-named tubular members inwardly soas to cause the perforations therein to registerwith the' perforations in said mst-named tube means, a double-acting cam in position for-operative engagement with both of said second-named tubular Vmembers for moving them in opporte directions against the action of said spring means for cutting down gradually the degree of registration of said perforations, and means for givingsaid cam an operative movementund for showing the extent of the closure of said perforations.

3. In a mechanism for applying solvent to copy sheets being fed forward in a duplicating ma`- chine, the combination of a tube having a plurality of equally spaced perforations therein through which said solvent is discharged, means for supplying solvent to the tube,` and a periorated tubefslidably mounted on the nrst tube, the perforations in the second tube being progressively larger suchthat a plurality of perforations in the nrst tube `may be closedby an axial movement` o! the second tube through a distance which is not substantially greater than the axial distance betweensuccessive perforations closed.

4. In a mechanism for/applyingsolvent to copy sheets beingi'edfV forwardin a duplicating machine, the oombinationof a tube having a plurality of equally lspaced perforations therein throughvwhich said solvent is discharged, the periorations beingof substantially equal size, means 'for supplyingsolvent to the tube, and a tube slidablymountedon the first tubeand having perforations thereinoi' progressively greater axial dimensior'arsaid second tube serving progressivelyv `toclose the perforations in the nrst tube by an axial movement which is not substantially greater `than thedistance between successive perforations `in said first tube.y

5. In a mechanism for applying solvent to copy sheets being fed `forward in a duplicating machine, the combination of a tube having a plurality' of axially spaced perforations therein through which said solvent is discharged, the perforations beingof substantially equal size, means for supplying solvent to the tube, a tube siidably mountedlonthe first tube andhaving perforations therein of dprogressively greater axial dimension, said'second `tube serving progressively to close the perforations in the first tube by an axial movement which is less than the distance between successive perforations in said first tube, a radial extension on the` slidable tube, and a notched member xed relative to the first tube, said notches being adapted to receive the radial extension for holding said slidable tube releasably in adjusted position and for indicating the number of perforations closed.

ALFRED MARCHEV.

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