US2139168A

US2139168A - Calculating machine

Info

Publication number: US2139168A
Application number: US145719A
Authority: US
Inventors: Robert L Muller
Original assignee: Burroughs Adding Machine Co
Current assignee: Unisys Corp
Priority date: 1937-06-01
Filing date: 1937-06-01
Publication date: 1938-12-06
Anticipated expiration: 1955-12-06

Description

Dec. 6; 1938'. M LLER 7 2,139,168

CALCULATING MACHINE Filed ,June 1, 1937 2 Sheets-Sheet 1 11 Fig.1.

8 31 i (E l 51 23 2 I \J 14 a 24 32 v a 22 H l 87 I 7 16 98 1.9 15 1'7 r M In I 495 {I I 1 a W J I I! ;1 X 94 12 KEG O 92 X J 1 Y INVENTOR BY Roberf L. Muller ATTORNEYS Dec. 6, 1938.

CALCULATING MACHINE R. L. MULLER 2,139,168

Filed June 1, 1937 2 Sheets-Sheet 2 INVENTOR BY Robe/'7' L.. Muller ATTORNEYS sirable to Patented Dec.v 6, 1938 UNITED STATES PATENT :O'FFICE Robert L. Muller,

roughs Adding Application June 1,

This invention relates to an accounting machine and more particularly to the paper handling equipment of such a machine.

In certain classes of accounting work, it is dehave a running record in the nature of a journal sheet which contains all the entries that are made on separate sheets such as ledger sheets. Machines generally known as front-feed machines are used for this work in whicha record sheet remains in the machine while the individual work sheets are inserted'and removed in front of the platen and record sheet. The presentinvention is particularly applicable to this type of machine and it concerns an improvement matic removal of the work sheet while the record sheet remains in. the machine. This relieves the operator of most operations other than making entries on the amount keys. The general object of the invention is to provide an improved paper handling equipment for accounting machines.

Another object is to provide an improved frontfeed means for a machine of this type.

A more specific object is to provide an improved sheet-ejecting means for ejecting sheets in a front feed type of machine.

Other and more particular objects are to provide a fully automatic mechanism of this character that is constructed so that it is not only simple but also easy to operate, easily accessible and foolproof against misoperation.

Other objects and advantages of the invention will appear in the following specification and 35 drawings which illustrate one embodiment of the invention in which I Figure 1 is a left side elevation of a portion of a machine having the present invention applied thereto, the parts being shown in printing 1 position;

Fig. 2 is a partial sectional view taken through a the left side just inside of the paper carriage side plates and illustrating the parts in printing or closed throat position;

Fig. 3 is a similar view with the parts in frontfeed -or open-throat position, in which position the paper or record sheets are inserted in the machine; and

Fig. 4 is a fragmentary perspective of the i platen, feed and ejecting rolls illustrating the latter in their respective positions as a work sheet is being ejected. i

The invention is shown applied to a Burroughs bookkeeping or accounting machine of a type that is well known, and shown in the Burroughs scription of it is not for speeding of the work by providing for auto- Detroit, Mich, assignor to Bur- Machine Company, Mich, a corporation of Michigan 1931, Serial No. 1451119 25 Claims. (o1. 197 128) Detroit,

British Patent No. 382,613 so that a detailed denecessary. It will be understood that the invention can also be applied to othertypes of machines and that the disclosure herein is by way of illustration.

General machine features Referring to Figure 1, the machine has a plurality of amount keys ill, upon which items may pression of which causes the machine a cycle of operation. the machine shown, includes a turn stroke.

be entered and by which the machine can be operated in conjunction with a motor the motor it to give bar M, de-

This cycle, in"

forward and re- During its operating cycle the machine performs certain calculating functions such as addition, subtraction, totalizing, or other operations of which the the market are capable and such the heretofore mentioned British Burroughs machines now on as disclosed in patent and in many other patents upon said machines,

A printing mechanism is provided, of which a portion is shown at M (Fig. 1), said mechanism being normally operated near the end of a forward stroke of the machine and serving to print the amount of the item entered culations performed.

Provision is made in different columns on paper 1 or of the calfor printing automatically nserted in the machine and this is accomplished by having the paper carried by a platen P paper carriage way IS. The carriage is urged on the traveling l5 movable laterally on a raceto the left as viewed from the front and normally as the machine is cycled, the carriage moves automatically from column to column across the the control of the which portions are shown at l1 normally operated near cycle so that after the machine its function umn to be ready While the movement is normally umn to the adjacent column, any umns can be skipped, the Rinsche Patent No. 1,580,534.

The platen P can printing operation of whichportions mechanism can be adjusted to platen or it may be line-spaced a particular operation or in apar of the carriage.

machine under tabulating mechanism, of

' and which is the end of the machine has performed the carriage moves to the next colfor the succeeding operation.

from one colnumber of colas shown, for example, in

be line-spaced after each by a line space mechanism, l8 are shown in Fig. 1. This line-space the at the end of ticular position The paper carriage can be automatically returned across the machine by p ower from the l9 disclosed in said Rinsche patent.

The paper carriage and its controls, particularly the tabulating mechanism, comprise a column printing control means that enables printing to occur in predetermined columns on the paper in the machine.

Platen mounting The platen P is fixed to a shaft 20 journaled to rotate in two spaced side plates 2| (Figs. 2 and 3), which are fixed to a shaft 22 (Fig. 1) that is journaled in two spaced frame plates 23 of the traveling paper carriage. The platen is thus supported in a rockable frame on the paper carriage.

The platen is urged into printing position relative to the printing mechanism by gravity and by its springs, as will presently appear. It can be moved from printing to an out-of-printing or front-feed position, both manually and automatically. For this purpose a crank 24 (Fig. 1) is fixed to each end of the shaft 22. Each crank has a stud 26 on its end projecting into a cam slot 21 formed in its respective lever 28 fixed to a shaft 29 journaled in the frame plate 23 of the carriage. The front ends of the levers 28 are urged upwardly by springs 3| (Fig. 1) which tend to rock the crank in a direction to move the platen to printing position. The platen being forward of its pivot point about shaft 22 also tends to move to printing position by gravity. When the platen is in printing position, the shape of cam slots 2! in which studs 26 are positioned is such as to lock the platen in this position against any force applied to the platen itself, tending to move it away from printing position.

The platen can be moved from printing position by means of a manually operable lever such as shown in Muller Patent No. 2,110,399 and is also controlled automatically through levers 28 which are joined at their rear ends by a bail 32 (Fig. 1) that is operated automatically, as will presently be described. For further details of the platen mounting, reference is made to the Burroughs British Patent No. 382,613.

Record sheet The record or journal sheet R (Figs. 2 and 3) is held around the platen P for a series of operations and is arranged so that it can be line-spaced with the platen. The record sheet is inserted under the platen from the rear over a fiat guide 33 carried by the carriage side plates 23.

The record sheet is passed under and in front of the platen and turned rearwardly over the platen and passed under the pressure rolls 34 (Fig. 3) and is thus held in feeding relation about the platen so that it will be line-spaced as the platen is line-spaced. Also, as the platen is moved bodily from printing to front-feed position, the record sheet will move with it without having its line-spaced position disturbed. The record sheet is thus always in position to receive copies of the entries that are made on the work sheets which are inserted from time to time, the copies being made by means of carbon paper that is usually placed around the platen with therecord sheet. For further details as to the supporting of the journal sheet, reference is made to the aforementioned Burroughs British patent.

Front-feed means Provision is made for enabling individual work sheets W (Figs. 2 and 3) to be inserted from time to time in front of the platen. In order to re- 2,139,168 motor 2 through a carriage return mechanism ceive these sheets, an opening is preferably provided which will be called the front-feed throat, which is arranged to be moved from a closed to an open throat condition, and vice versa, as will presently ap'pear.

In the embodiment illustrated, the platen comprises one member of the throat. Cooperating with the platen and adapted to engage it are a series of feed or pressure rolls 40 (Figs. 2 and 3) carried by and between a pair of arcuate arms 4| pivoted upon a rod 42 carried by the rocking platen frame. The arms are normally urged counterclockwise about their pivot by springs 43, which normally tend to urge the rolls into contact with the platen. The upper ends of arms 4| carry rollers 44 positioned to engage a curved cam blade 45, one of which is fixed to each of the side frames of the carriage, as the platen moves from printing to front-feed position. The blades are so positioned relatively to the rollers 44 that immediately upon movement of the platen toward front-feed position, the rollers 44 ride upon the cam blades 45 and rotate the arcuate arms 4| about their pivots to move the pressure rolls away from the platen into open throat position. The rolls are retained in this position by the blades until just immediately before the platen reaches printing position in its return movement when rolls are released to reengage the platen. The opening and closing of the front-feed throat to receive the work sheet is automatic, that is, when the platen is moved from printing position (shown in Fig. 2) to front-feed position (shown in Fig. 3), the throat is automatically opened and when the platen is returned to printing position (Fig. 2)

" the throat is automatically closed.

In order to guide the work sheet to front-feed position, a paper table or chute 50 is provided which is pivoted upon a rod 5| (Figs. 2 and 3) on the paper carriage. The table is provided at each side with a stud 52 which is engaged by the upper cam edges of the tilting platen frames 2| so that when the platen frame is moved, the chute will be swung about its pivot. When the platen is in its front-feed position (Fig. 3), the chute is in its sheet-receiving position where it acts to receive and guide an inserted work sheet to front-fed position. When the platen is moved to printing position (Fig. 2), the cam edges of the side plates 2| engage studs 52 and swing the chute to sheet-holding position. As this occurs, the bottom edge of the chute engages the inserted sheet above the printing line of the platen and tends to draw the sheet about the platen. The sheet is engaged below the printing line of the platen by the pressure rolls 40, and it is thus held in printing position on the front-feed side of the platen by being engaged and held both above and below the printing line. When the platen is moved to front-feed position, the upper edges of the platen frame side plates 2| release studs 52 on the paper chute and permit it to drop clockwise about its pivot 5| to its sheet-receiving position (Fig. 3).

For the further convenience of the operator there is provided a pair of magazines 53 for holding a supply of work sheets. These magazines are preferably formed of sheet metal and are supported between two end plates 54 pivoted at their rear ends to the carriage frame at 55 and detachably held at their forward ends to rod 5| by latches 56 (Fig. 1). These magazines are conveniently disposed above and adjacent the platen so that it is only necessary for the operator to pick a work sheet from either one of the magazines as desired and drop it down in front of the platen over the chute 50 and into the throat as shown in Fig. 3. By unlatching' the magazines they may be swung rearwardly about pivots to permit insertion of a new journal sheet.

The work sheets are automatically arrested in proper position relative to the printing line of 'the platen and the printing mechanism when they are dropped in front of the platen by an adjustable stationary stop as shown in Fig. 3, carried by a stationary plate or lower table 6| which lies beneath the platen, extends rearwardly to a receptacle 62 into which the work sheets are ejected, as will presently appear.

Work sheet ejecting means Provision is made for automatically and positively ejecting the work sheets successively so that the operator does not need to bother with removing the sheets upon which operations have been performed.

The ejecting means comprises a series of upper ejecting rolls 65, a lower positively driven ejecting roll 66, and associated mechanisms. The two rolls are disposed just to the rear of and some- What below the platen forward of the stop 60, and are adapted to receive drop through the open throat formed by the platen P and rolls 40. The upper rolls are carried by arms projecting from a yoke 61 extending across the machine and being pivoted at 68 to the tilting platen frame and urged clockwise by a spring 69 with the rolls being carried by the tilting platen frame also moves about a radius with the shaft 22 as a center each time the platen'is movedto and from printing position.

When the platen is at its lowermost or printing position (Fig. 2), an arm 10 of the yoke 61 engages a stud H as shown in Fig. 2 and rocks the yoke counterclockwise about its pivot '68 sufiiciently to remove the upper rolls 65 from the lower roll 56 and thus open the throat between the

rolls

65 and 66. In other words, when the platen is in printing position with the main front-feed throat closed the throat formed by the two ejecting rolls, which may be called a second throat, is open, permitting line feeding or spacing movement of the work sheet by the platen line spacing means. Immediately upon movement of the platen toward front-deed position, arm 10 moves away from stud 1|. and the ejecting rolls close to grip the sheet. To put it another way, when the main front-feed throat is opened, the second throat is closed. The sheet is free of the means that holds it about the platen and the ejecting rolls then hold the work sheet and are in position to cause ejection thereof. This position is maintained until the platen with the yoke 61, turning about axis 22, approaches the end of its opening movement, at which time a lower projecting arm 13 of. the yoke engages a stud I l on the carriage as shown in Fig. 3 whereby the yoke is again rocked about its pivot 68 and the ejecting rolls are separated. At all other times the

rolls

65 and 66 are maintained closed, 1. e., in sheet-gripping position by spring 69.,

The ejecting rolls thus serve to grip the frontfed sheet from a time immediately after the platen starts moving from printing position until just prior to the time said platen reaches its front-feed position. This gives the ejecting rolls an opportunity to eject the sheet as will be presently described. Conversely, when the platen is moved from front-feed to printing position, the

' position eliminates any the work sheets as they about pivot'68. The yoke 61 together ejecting rolls grip the work sheet immediately after the platen starts to move and hold the work sheet until just prior to the time the platen reaches its front-feed position where the sheet isgrippe by the devices that hold it in printing position. This gripping of the sheet by the ejecting rolls while the platen is moving to printing the papers due to contact with the platen as it is being lowered into printing position because in so moving it usually engages the sheets and tends to move them so that they might get out of alignment.

shifting or skewing of For the purpose of ejecting the work sheet, the

lower roll 66 is positively driven. 'It is secured to the left end of a sleeve 15 journaled on shaft 22 (Fig. 4). Secured to the right end of sleeve 15 is a gear 16 which meshes with a second gear H which in turn meshes with a third gear 18 fixed to shaft is. Shaft 19 extends through the left platen frame and carries a gear 80 (Fig. 4); upon its outer end. Gear Sill engages a gear M which in turn engages a large ring gear 32 (Figs. 1 and 4) which is preferably driven automaticallyby the mechanism that opens the frontfeed throat. It will be recalled that the platen is thrown back and the front-feed throat opened by rocking the levers 28 clockwise about their pivots 29 whereby the cranks 24 are rocked counterclockwise. The levers 28 may be rocked by hand as described in Muller Patent No. 2,110,399, but they are preferably rocked by power through the action of a power means on the carriage bail 32. The arm 28 shown in Fig. 1 is-provided with a sector '83 (Fig. 1) formed on the end of a projection 84, which sector meshes with the pinion t5 fixed to a ratchet 36. The ratchet is engaged by a pawl Bl carried by the large ring gear 82. The pawl and ratchet are so arranged that upon raising of bail 32, that is, upon clockwise movement thereof, rack 83 moves downwardly, thus rotating the pinion 85 in a counterclockwise direction so that the teeth of the ratchet engage the pawl and rotate the large ring gear 82 counterclockwise. This'causes the lower ejector roll 66' to be rotated counterclockwise and eject the paper rearwardly. Upon lowering of the carriage bail or counterclockwise movement thereof pawl 81 passes'over the ratchet teeth and the ejecting rolls are not driven.

From the foregoing it follows that during the throwback movementof the platen, that is, durand the ejecting rolls are not rotated. They act at that time to hold the new sheet in position until grasped by the devices that hold said sheet in printing position. After the sheet is so gripped, the ejecting rolls automatically open to permit the new sheet to be line-spaced during printing.

When the platen is in front-feed position and the work sheet W is inserted, the lower edge of the work sheet engages the stop member 60, but after the platen is moved toward printing position the. lower edge of the work sheet is tilted above the stop 60 as shown in Fig. 2. As the platen moves away from printing position, the ejecting rolls grip the work sheet and hold it in position to pass over the stop 60. These rolls start to rotate quickly, with the result that the sheet is moved over stops 60 before the front or upper end of the sheet is released to such an extent as to appreciably tend to cause its lower end to engage stop 60. This means that the stop does not have to be removed as it is not in the path of travel of the sheet as it is ejected by the rolls under the platen and rearwardly into the receptacle 62.

Automatic power-operated control In the illustrated embodiment of this invention the work sheet is automatically ejected, without any attention on the part of the operator, by power of the motor, that is, the carriage bail 32 is automatically raised by power derived from the operating motor and it is returned by springs. This mechanism is shown in the heretofore mentioned Burroughs British patent and, accordingly, will only be briefly described herein.

Referring to Fig. 1, a lever 90 is pivoted on the frame of the machine and is urged clockwise by a relatively strong spring 9|. The forward portion of the lever carries a stud 92 adapted to be engaged by a snail cam 93 that is given one revolution by the motor I 2 each time the machine is given a cycle of operation. The rear end of the lever is connected by a link 94 to a slide 95 that carries a roller 96 on its upper end adapted to engage the under side of the carriage bail 32. This bail is, as previously described, connected to the levers 28 that control the opening and closing of the front-feed throat and the position of the platen. position by a latch carrying a pass-by pawl 91 adapted to be engaged by the stud 98 on the bail. The latch may be tripped by the stud 98 upon either tabulating or return movement of the paper carriage depending upon the position of the pass-by pawl.

location and the number of the'studs. The latch for slide 95 can also be released by a key as described in said British patent. It can also be released by the stud on the carriage bail while the carriage remains stationary by locating said stud relative to the tab stop that arrests the carrlage so that said stud trips out the latch when the bail is lowered.

Briefly. the power mechanism just described operates as follows: With the parts in the position of Fig. 1, the stud 92 on lever 90 is above the low portion of the snail-back cam as shown, the slide is latched in its lower position, the bail is in its lower position, and the platen is in printing position. If the latch for slide 95 is tripped immediately, as by a key, the slide is released, whereupon spring 9| rocks lever 90 clockwise and moves slide 95 upwardly- Ordinarily, however, the machine is first given a cycle of operation. This causes snail cam 93 to rotate so that, even though the latch 91 were released, lever 90 could not rock immediately because the high part of the cam passes under roller 92. Near the end of the cycle, however, the low part of snail cam 93 comes under roller 92, and also during the latter part of the cycle, the carriage ordinarily tabulates. If the release of the latch 91 is by the tabulating movement of the carriage, the power mechanism is thus automatically released and caused to operate near the end of the cycle.

The slide is normally latched in lowered This raises bail 32 upwardly and moves levers 28 clockwise as viewed in Fig. 1. This movement of the levers raises the platen and opens the front-feed throat and causes the ejecting means to rotate to automatically eject the sheet rearwardly and under the platen.

During the next cycle of operation of the machine, cam 93 is again rotated, whereupon it engages stud 92 to rock lever 90 counterclockwise. This draws the slide downwardly and releases the ball 32, whereupon the platen moves to printing position by gravity and under the urge of its spring.

Operation Although the operation of the machine would be clear from the description already given, a brief summary will be given.

First a record sheet is inserted about the platen. In order to do this the magazines are uhlatched and tilted rearwardly and the platen is moved away from printing position to frontfeed position. This opens the main front-feed During the final stage of movement of the platen, the second throat formed by the ejecting rolls is opened. The record sheet is then inserted under the platen from the rear, passed under the auxiliary pressure rolls, and adjusted to proper line space position in which position it is held by the auxiliary pressure rolls. The operator then takes a work sheet from one of the magazines and drops it into the front-feed throat, the sheet limiting against the stops, as shown in Fig. 3. He

chine a cycle of operation by depressing the motor bar. As the machine starts to operate, the slide 95 is pulled down and the platen is lowered automatically. The work sheet is grasped immediately by the automatic closing of the ejecting rolls or second front-feed throat which rolls firmly hold the work sheet against shifting while the platen is being lowered to printing position. As the platen reaches printing position the work sheet is engaged both above and below the printing line of the platen-that is, the front-feed throat is closed, and the second throat formed by the ejecting rolls is opened. After the entry has been printed on the sheets the carriage moves to the next columnar position. Assuming that several entries are to be made on the work sheet, they are made on amount keys and the machine is given a cycle of operation after each entry. The ejecting means, however, is not operated until the levers 28 are rocked, either by hand, or automatically. Assume that the operation is automatic and that a'stud on the carriage bail engages the latch 91 to release the slide 95 when the carriage tabulates near the end of the cycle.

releases the latch and permits the bail to rise. This causes the platen to be moved back; the front-feed throat to be opened; the ejecting rolls to grip the sheet; and, as the platen is moved back, the driving sector rotates the associated pinions and causes rotation of the ejecting rolls which, in turn, eject the work sheets rearwardly under the platen and into the receptacle. All this happens while the platen is moving to frontfeed position so that by the time the platen has front-feed position the work sheet .has been e ected and the ejecting rolls are again opened, thus permitting insertion of a second work sheet immediately. It will be unin the details of construction without departing from the spirit and scope of this invention as defined in the appended claims.

I claim:

1. A machine of the class described having lo printing means for making type impressions, a"

platen, sheet-holding means for holding an individual work sheet about said platen while it receives printing impressions from said printing means, a sheet-ejecting means pendently of said platen and sheet-holding means for positively ejecting said Work sheet beneath and rearwardly of said platen, said sheet being free of said ejecting means while it is held about said platen in printing position, and means operable to condition said sheet-holding means to free said sheet for movement relative .to said platen and to cause said ejecting means to operate automatically to eject said sheet clear of said platen beneath and to therear thereof.

2. A machine of the class described having printing means for making type impressions, a platen, sheet-holding means for holding an individual .work sheet about said platen while it receives type impressions, a sheet-ejecting means including a set of ejecting rolls separate from and below said platen between which said work sheet passes when fed into said machine, means for causing said sheet-holding means to hold a sheet about said platen for a printing operation, and means operable to move said ejecting rolls to cause said rolls to grasp said sheet, to condition said sheet-holding means to release said sheet for movement relative to said platen and to cause said ejecting rolls to eject said sheet beneath and to the rear. of said platen.

3. A machine or the class described having a'printing means, a rotatable platen movable bodily from a printing position relative to said printing means to an out-oi-printing position and vice versa, means for moving said platen from one position to the other,. sheen-holding means for holding an individual work sheet in,

printing position relative to said platen while it receives printing impressions from said printing means, a sheet-ejecting means disposed beneath said platen separate from said platen and operable independently of said sheet-holding means for positively ejecting said work sheets, and means operating automatically as said platen is moved from printing to out-of-printing Position to cause said ejecting means positively to eject said work sheets to the rear and beneath said platen. r

4. A machine of the c ass described having a printing means, a rotatable platen movable bodi- 1y from printing position relative to said printing means to an out-of-printing position and vice versa, means for moving said platen from one position to the other, sheet-holding means for holding a work sheet in printing position relative to said platen and movable to non-holding position immediately upon movement of said platen from printing position toward out-ofprinting position, a set of ejecting rolls positioned below said platen and normally-held separated, power meanstending to rotate said rolls and operating automatically as said platen is moved from printing toward out-of-printing position immediately to move said ejecting rolls together a 'and to ,rotate said rolls to eject said sheets to operable indehaving a printing means,

the rear and beneath said platen, and means operable as said platen is returned to printing position to separate said ejecting rolls.

5.. A machine of jjthe class described having means for giving it cycles of operation, a printing mechanism operable automatically at a predetermined point in the machinecycle, a rotatable platen, sheet-holding means for holding an individual work sheet on said platen while it receives printing impressions from said printing mechanism, a sheet-ejecting means disposed beneath said platen separate from said platen and operable independently of said platen and of said sheet-holding means in" an ejecting operation, and power means operating automatically during a cycle of machine operation and after said printing mechanism has operated to condition the sheet-holding means to cause it to release said work sheet for said platen and to cause said ejecting means positively and automatically to' eject said sheet beneath said platen and horizontally to the rear and clear of said platen.

6. A machine of the class described having a printing means, a traveling paper carriage provided with a platen, sheet-holding means for holding-a work sheet in printing relation to said platen'to receive printing impressions, a sheet-ejecting means disposed beneath said platen, and power-operated means controlled movement relative to 'by said paper carriage operating automatically to condition said sheet-holding means to free said work sheet for movement relative to said platen and to cause said ejecting means automatically and positively to eject said sheet beneath and to the rear of said platen in a predetermined position of said carriage.

'7. A front-feed machine of the class described having a printing means, a rotatable platen, means for holding a record sheet about said platen; front-feed means for enabling a work sheet to be front fed relative to'said platen and for holding said sheet in front-fed position, said front-feed means including portions forming a front-feed throat movable from a closed to an open-throat condition and vice versa, 2. work sheet ejecting .means disposed beneath said platen, and means operable to open said frontfeed throat and cause said ejecting means automatically and positively to eject said work sheet beneath and to the rear of said platen while leaving said record sheet about said platen.

8. A front-feed machine of the class described having a printing means, a platen, means for holding a record sheet about said platen, a guide for guiding a work sheet into front-fed position relative to said platen, for engagingan inserted the printing line of said platen to hold said sheet in position about said platen for a printing operation ofsaid printing means, work sheet ejecting means disposed beneath said platen, and means operable to cause a relative -movement between said platen and sheet engaging devices to free the work sheet and to cause said ejecting means automatically and said work sheet beneath and to the rear'o f'said platen while leaving said worksheet about said platen. I

9. A front-feed machine of the class described a rotatable platen, means for holding a record sheet about said platen, front-feed means sheet to be front-fed relative to said platen and for holding said sheet in iront fed' position, said positively to eject sheet engaging devices sheet above and'below for enabling a. work ing position until front-feed means including portions forming a. front-feed throat movable from a closed to an open-throat condition and vice versa, a work sheet ejecting means disposed beneath said sheet beneath said platen and substantially horizontally to the rear into a receptacle whereby the sheets ejected by the machine will be in the same order as their order of insertion in the machine.

10. A front-feed machine of the class described having printing means, a platen, a guide for guiding a work sheet into front-fed position said sheet-engaging means and said platen to free said sheet, work sheet ejecting means operating automatically to eject the sheet when it is released,v and means for causing a relative movement between said platen and sheet engaging means sheet for a printing operation, said ejecting grip said sheet and hold it until it is held by said engaging means and to then release it.

11. A front-feedmachine of the class described fed relative to said platen and for holding said sheet in front-fed position, said front-feed means including portions forming a front-feed throat movable from a closed to an open-throat condition and vice sition to front-reed position and throat. ejecting means operating automatically said front-feed throat is closed. said ejecting means subsequently releasing said sheet to permit it to be line spaced.

13. A front-feed machine of the class described having a printing means,' a rotatable platen,

means for holding a record sheet about said platen, a front-feed means for enablying a work sheet to be front fed relative to said platen and for holding said work sheet in front-fed position, said front-feed means including portions formsheet ejecting means having a second front-feed throat disposed beneath said platen into which said work sheet moves when it is inserted to front-fed position, means operable to open said first-mentioned front-feed throat and simultaneously close said second front-feed throat and to cause' said ejecting means automatically to eject said work sheet clear of said platen while leaving said record sheet about said platen, and means for thereafter opening said second frontfeed throat while said first front-feed throat remains open whereby a new sheet may be frontfed into both of said throats.

14. A front-feed machine of the class described having a printing means, a platen, means for holding a record sheet about said platen, frontfeed means for enabling a work sheet to be front fed relative to said platen and for holding said work sheet in front-fed position, said front-feed means including portions forming a front-feed throat movable from a closed to an open-throat condition and vice versa, work sheet ejecting rolls positioned beneath said platen and constituting a second front-feed throat, operating means for closing said front-feed throat and opening said ejecting rolls to permit line spacing of said work sheet, said operating means being also operable to open said front-feed throat and to close said ejecting rolls upon said sheet and to cause said rolls automatically to grip and elect said sheet beneath and to the rear of said platen while said record sheet remains about said platen.

15. A front-feed machine of the class described having a printing means, a rotatable platen movable bodily from a, printing position relative to said printing means to a front-feed position and vice versa, means for holding a record sheet about said platen, front-feed means for enabling a work sheet to be front fed relative to said platen and for holding said sheet in front-fed position, said front-feed means including portions forming a front-feed throat movable from a closed to an open-throat condition and vice versa, means for moving said platen from printing position to front-feed position, ejecting means for ejecting said work sheets clear of said platen, and means operating automatically and as said platen is moved from printing toward front-feed position to open said front-feed throat and to condition said ejecting means automatically to eject said Work sheet beneath and to the rear of said platen while said record sheet remains about said platen.

16. A front-feed machine of the class described having a printing able bodily from a printing position relative to said printing means to a front-feed position and vice versa, means for holding a record sheet about said platen, front-feed means for enabling a work sheet to be front fed relative to said platen and for holding said sheet in front-fed position, said front-feed means including portions forming a front-feed throat movable from a closed to an open-throat condition and vice versa, means for moving said platen from printing posimeans, a rotatable platen movating automatically as said platen is moved fromv printing toward front-feedposition toopen said front-feed throat and to cause said ejecting means automatically to grip and eject said work sheet beneath and to the rear of said platen, while said record sheet remains about said platen,

andto thereaftercondition said ejecting means to receive another work sheet while, said front-.

feed throat remains open.

17. A front-feed machine of the class described having a printing means, a rotatable platen moviable bodily from a printing position relative to said printing mechanism to a front-feed position and vice versa, means for holding a record sheet about said platen, front-feed means for enabling a work sheet to be front fed relative to said platen and for holding said sheet in front-fed position, said front-feed means including portions forming a throat movable from a closed to an openthroat condition and vice versa, a work sheet ejecting means below said platen, said ejecting means being movable to receive a work sheet and also being movable bodily with said platen to facilitate insertion of a record sheet about said platen and into said ejecting means, means for closing said ejecting means when said platen is moved to front-feed position from printing position or vice versa, and means for opening said ejecting means upon said platen reaching either final front-feed position or final printing position.

18. A front-feed machine of the class described having means for giving it cycles of operation, a printing mechanism operated at a predetermined time during a cycle of machine operation, a platen, means for holding a record sheet about said platen, front-feed means for enabling a work sheet to be front fed relative to said platen and for holding said work sheet in front-feed position, said front-feed means movable from a closed to an open-throat condition and vice versa, work sheet ejecting means disposed beneath Said platen, and power means operating automatically during a cycle of operation of said machine and after said printing mechanism has operated to open said front-feed throat and cause said ejecting means automatically and positively'to eject said sheet beneath and to the rear of said platen while said record sheet remains about'said platen.

19. A front-feed machine of the class described having a printing means, a platen, means for holding a record sheet about said platen, frontfeed means for holding a work sheet tobe front fed relative to said platen and forholding said sheet in front-fed position, said front-feed means including portions movable from a closed to an open-throat condition and vice versa, a work sheet ejectlng'means beneath said platen, printing control means for occur in predetermined columns of said work sheet, and power means controlled automatically in accordance withcolumnar printing to open said front-feed throat and cause said ejecting means automatically and positively to eject said work sheet beneath andto the rear of said platen after printing occurs in a predetermined column and while said record sheet remains in position about said platen.

20. A front-feed machine of the class described having a printing riage provided with a platen, means for holding a record sheet about said platen, front-feed means for enabling a work sheet to be front fed relativeto said platen and for holding said sheet including portions I causing printing to platen out of means, a traveling P per car- I in front-fed position, said front-feed means ineluding portions forming a throat movable from a closed to an open-throat condition and vice versa, a work sheet ejecting means below said platen, and power means controlled by said paper carriage acting automatically to opensaid front-feed throat and cause said ejecting means automatically and positively to eject said work sheet beneath and to the rear of said platen while said record sheet remains about said platen.

21. A front-feed machine of the class described, having a printing means, a traveling paper carriage provided with a platen, means for moving'said platen from printing position relative to said printing means to a front-feed position and vice versa," means for holding a record sheet about said platen, front-feed means for enabling a work sheet to be front fed relative to said platen and for holding said sheet in front-fed position, said front-feed means including portions movable from a closed to an open throat condition and vice versa, a work sheet ejecting means beneath said platen, and power automatically in accordance with the position of said paper carriage. for causing said platen to be moved from printing to front-feed position to cause said front-feed throat to be opened upon movement of said platen and to cause said ejecting means automatically and positively to eject said work sheet beneath and to the rear of said platen while said record sheet remains about said platen.

22. A front-feed machine of the class described having a printing means, \a platen, means for holding a record sheet about said platen, feed means for enablingawork sheet to be front fed relative to said platen andfor holding said sheet in front-fed position, said front-feed means having portions forming a throat movable from means controlled 1 from printing position fronta closed to an open-throat condition and vice versa, means for opening and closing said throat, an ejecting means operable to eject a work sheet assaid throat is opened, stops for arresting a new sheet in proper line spaced position when a new sheet is inserted in said open throat, said front-feed means and platen being constructed and arranged so that, when said throat is closed, the end of said work sheet adjacent said stops will be moved so that said sheet will clear said stops when said ejecting means operates.

23. A front-teed machine of the class described having a printing means, a rotatable platen movable bodily from a, printing position relative to said printing means to a front-feed position and vice versa, front-feed means for enabling the work sheet to be front fed relative to said platen and for holding said sheet in front-fed position, said front-feed means including portions forming a throat that is movable trom a closed to an openthroat condition and vice versa, ejecting means for ejecting a work sheet, means for moving said printing position, for opening said throat and for causing saidejecting means to eject the work sheet, stops forarresting a new work sheet in line spaced position when said sheet is inserted in said open throat, said platen and front-feed means being constructed and arranged so that, when said throat is closed, the edge or relative to said platen and for holding said sheet in front-fed position for operations of said printing means, said front-feed means including pornew work sheet to be against said limit stops.

25. A front-feed machine of the class described having a printing means, a platen movable from ROBERT L. MULLER.