US2126138A - Folding machine - Google Patents

Description

Aug. 9, 1938.

N Q to N K. F. RIESE 2,126,138

FOLDING MACHINE Filed July 20, 1956 4 Sheets-Sheet 1 swam ton Karl R Ls e gjjj g 9, 1938 K. F. RIESE 2,126,138

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1a 24 Karl F. Riese Aug.9,1938. KFQRIESE 2,126,138

. FOLDING MACHINE Filed July 20, 1936 4 Sheets-Sheet 4 (IIIIIIIIIIIIIIIIIIIIIIIIIIII/I I Karl E R1256 Patented Aug. 9, I938 UNETED STATES ZAZtJEd PATENT OFFEE 11 Claims.

results quickly and positively.

A still further object of the invention resides in providing a folding machine in which the sheets are first creased and thereafter folded.

Another object of the invention resides in providing a machine in which the folded sheets are pressed together so as to become relatively flat to permit of easy insertion into the envelopes.

A feature of the invention resides in providing an extremely compact machine which will occupy a minimum amount of space.

An object of the invention resides in providing a machine in which all of the operations are automatically performed.

Another object of the invention resides in pro viding a folding machine in which creasing of sheets is accomplished by scoring rolls.

A still further object of the invention resides in providing a folding machine in which folding of creased sheets is accomplished by means of a table on which the folded sheets are deposited together with two pivoted blades having their axes in close proximity to said table and movable from extended positions to positions overlying said table, whereby the portions of the sheets adjacent the score marks: thereon are successively folded into overlying position.

Another objectof the invention resides in utilizing one of the scoring rolls as a part of the pressing mechanism.

A still further object of the invention resides in reversing the travel of the sheet through the machine so as to reduce the length of the machine.

Other objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/or described.

In the drawings: I

Fig. 1 is a plan View of a folding machine illustrating an embodiment of my invention.

Fig. 2 is a longitudinal sectional view taken substantially on line 2-2 of Fig. 1.

Fig. 3 is an end elevational view of the structure shown in Fig. 1. i

Fig. 4 is a transverse-sectional view taken on line l i of Fig. 1.

Figs. 5 to are diagrammatic views showing the various steps through which the paper passes during the folding thereof. 7 My invention consists generally of a creasing mechanism indicated by the reference numeral A and to which sheets of paper arranged in a magazine B are fed by means of a feed mecha nism C. The sheets upon leaving the creasing mechanism are delivered to a folding mechanism D which folds into overlying positions the portions of the sheet formed by the creases. A second feed mechanism E moves the folded sheets from the folding mechanism D to a pressing mechanism F from which the sheets are delivered into a receiver G. The various mechanisms of the'invention are carried by a framework indicated in its entirety by the reference numeral H. These various parts of the invention will now be described in detail.

The framework H consists of two longitudinal frame members l5 and i6 which are cast in the desired form to support the various parts of the invention. These castings are constructed with legs H which depend therefrom and which have rubber feet l8 attached to the lowermost portions of the same. The framework rests upon a table or other surface upon which the machine is supported through the feet l8. These feet are preferably formed of rubber and hold the entire machine from movement during the operation thereof. The two frame members I5 and it are held in spaced relation by means: of four rods 2 l, 22, 23 and 26. These rods are reduced in diameter at their ends and threaded to receive nuts 25 which clamp the frame members l5 and it against the shoulders formed on the ends of said rods. Such construction forming no particular feature of the invention has not been shown in detail in the drawings.

The creasing mechanism A includes two scoring rolls 26 and 2'! which are mounted upon a shaft 28. These rolls are formed with V shaped ridges 29 which are adapted to enter V shaped grooves 3| in complemental scoring rolls 32 and 33 mounted on a shaft 34. The shaft 28 is journaled in two bearings 35 and 36 mounted in the frame members l5 and It. This shaft is held from endwise movement within said bearings by means of a sprocket wheel 37 attached to the said shaft exteriorly of the frame member i5 by means of a set screw 38 and by means of a collar 39 similarly attached to said shaft upon the other side of said bearing 35 by means of a set screw 4!. The two score rolls 26 and 2! may be moved axially along the shaft 28 and are held in adjusted position thereon by means of thumbscrews 42 and 43.

The shaft 34 is supported in a manner to permit of movement of said shaft toward the shaft 28 to effect pressure between the rolls 32 and 33 and the complemental rolls 26 and 21. This is accomplished as follows: Upon the inner surfaces of the two frame members I5 and I6 are provided spaced guides 44. The facing surfaces of these guides are accurately milled to form ways along which two bearing blocks 45 and 46 may slide. These bearing blocks are constructed with bearings 41 in which the shaft 34 is rotatable. The blocks 45 and 45 are held in position within said ways by means of plates 48 which are secured to the guides 44 by means of machine screws 49. It can readily be comprehended that when the blocks 45 and 45 are urged upwardly, the rolls 32 and 33 are urged into engagement with the rolls 26 and 21, forcing the V shaped ridges 29 of said last named rolls into the grooves 3| of the rolls 32 and 33.

For the purpose of sliding the bearing blocks 45 and 46 upwardly, two levers 5| and 52 are employed. These levers are pivoted on a shaft 53 which is attached to the frame members I5 and I6. Said levers are constructed with heads 54 which engage the under surface of the blocks 45 and 46. The free ends of said levers which are designated by the reference numerals 51 and 58 are urged downwardly by means of compression coil springs 6i and 62. These coil springs encircle bolts 65 which are attached to a cross bar 64 secured to the frame members I5 and I6. Nuts 64 threaded on the ends of these bolts limit the downward movement of said levers. It can readily be comprehended that when the said portions 51 of said levers are urged downwardly through the springs 6| and 62 that the blocks 45 are urged upwardly and pressure applied between the two pairs of scoring rolls.

For the purpose of illustration, a stack of sheets has been shown in Fig. l which is indicated in its entirety by the reference numeral 65. The individual sheets in the stack are designated by the reference numeral 66 and the uppermost sheet by the reference numeral 61. The stack of sheets 65 is supported by the magazine B. This magazine is constructed with a bottom 68 disposed considerably below the points of tangency of the scoring rolls. This bottom is constructed from sheet metal with laterally extending flanges 10 which are secured to the frame members I5 and I6 by means ofscrews 89. At the forward end of this bottom is provided an upturned lip, 69, the leading edge H of which is in close proximity to the points of tangency of the scoring rolls. The paper sheets 66 carried by the magazine are fed one at a time from the stack '65 and the forward edges thereof engage the lip 69 and are. moved upwardly to a position where the same may be grasped by the scoring rolls and fed through the said rolls through the friction resulting due to the pressure applied to the rolls 32 and 33.

The sheets 66 are held in position laterally by means of two side register gauges 12 and 13 which rest upon the bottom 68. These gauges are provided with brackets 14 projecting outwardly therefrom through which bolts 15 extend, Bolts 15 further extend through laterally positioned slots i6 in the bottom 68, whereby adjustment of the gauges l2 and 13 laterally of the magazine B may be had. The two gauges 12 and 13 are constructed with friction pads 11 which are mounted on leaf springs 18 attached to the said gauges by means of rivets 19. These pads may be constructed of rubber, leather or some other suitable material and press against the edges of the sheets 66, which prevents all of the sheets being removed from the stack at one time when the feed mechanism C is in operation. Tension on the springs 18 may be procured by means of adjusting screws 8| best shown in Fig. 1 which pass through said leaf springs and are threaded into the gauges 12 and 13.

For controlling the longitudinal position of the stack 65 in magazine B an end gauge I is employed. This end gauge is constructed with a bracket I86 similar to that of the gauges 12 and 13 through which a bolt I81 extends. Bolt I81 also passes through a slot I88 in the bottom 68 which runs longitudinally of the device and is disposed medially of the lateral edges of said bottom. By means of this construction the position of the gauge I85 may be adjusted at will.

The feed mechanism C includes a shaft 82 which is journaled in bearings 83 mounted in the two frame members I5 and I6. This shaft has secured to it two upstanding arms 84 and 85 which are constructed with bosses 89 rigidly secured to said shaft by means of pins 81. These two arms rotatably support another shaft 88 parallel to the shaft 82, which latter shaft is constructed with reduced ends 89 mounted for rotation in the two arms 84 and 85. Nuts 9| screwed upon the ends of said shaft hold the shaft properly positioned with respect to said arms and prevent the arms from spreading at their upper ends.

The feed mechanism C further includes a feed roller 92 which is provided with a shaft 93 rotatably mounted in a fork 94. The roller 92 is constructed of rubber or some other suitable material having a suitable friction surface adapted to frictionally engage the uppermost sheet and feed the same toward'the creasing device A, The shaft 93 is mounted in slots in the fork 94 so that said roller 92 may move toward and from the cross bar 96 of said fork. Attached to the cross bar 96 (Fig. 5) is a blade 91 which is adapted to engage the surface of the roller 92. An arm 98 is attached at one end to the cross bar 96 of fork 94 and at its other end is secured to a head 99 which is drilled to receive the shaft 88 which passes through the same. Thishead is tapped to receive a set screw IQI by means of which the head 99 may be rigidly secured to the shaft 88. It will readily be seen that when the arms 84 and 85 are moved in a clockwise direction, as viewed in Fig. 2. that the fork 94 is pulled away from the roller 92, the shaft 93 of which slides in the slots 95'. This frees the blade 91 from the periphery of the roller 92, permitting said roller to rotate freely. When the arms 84 .and 85 are moved in acounter-clockwise direction, fork 94 is urged toward the roller 92 and the blade 91 brought into contact with the surface of said roller. This restrains rotation of said roller and the surface thereof engages the uppermost sheet 61, moves said sheet forwardly, c '11" the leading edge thereof to ride along the lip 89 and to be fed in between the two sets of scoring rolls.

The paper on leaving the creasing device A is deposited on a table I92 forming a part of the folding mechanism D. Table I92 is constructed from sheet metal being provided with flanges I93 which are attached to the two frame members I5 and I6 by means of screws 294. Mounted on the table I 92, are four bearings I94 and I95 which are attached to said table by means of screws I96 and I91. In the bearings I94 is journaled a shaft I98 and in the bearings I05 is journaled a shaft I09. The shaft I08 has attached toit a blade I I I which is adapted to swing from a position parallel to said table and in close proximity thereto to a position extending outwardly from said table. The shaft I09 has attached to it a similar blade I I2 which is movable in the same manner as blade II I. The blades III and I I2 are normally supported in upwardly extending diverging relation, as shown in Figs. 5 to 10. For this purpose, two sheet metal supports H3 and H4 are employed which are attached to the table I02 and which extend upwardly above the blades III and H2 and form guides for guiding the creased sheet in position upon the table I02 and between the blades III and H2.

The creased sheet, as previously stated, is deposited upon the table I02 between the blades III and H2. The position of the sheet when so disposed is indicated in Fig. 5. Blades III and I I2 are caused to successively swing into juxtapositio-n with table I02 to foldover the portions of the sheet adjacent the score marks or creases therein. This is accomplished in the following manner:

Journaled in two bearings H5 and H6 attached to the table I02 is a shaft I N. This shaft is also journaled in bearings formed in the frame members I5 and I6 which have not been illustrated in the drawings. Shaft HI carries twospiral cams H8 and H9 which are attached thereto by means of screws I 2|. These two cams are adapted to engage two arms I22 and I23 secured to the ends of the shafts I08 and I 09 by means of screws I24. The shaft I I1 rotates in a clockwise direction as viewed in Fig. 2 and the cams HB'and H9 engage the arms I22 and I23 and swing the shafts I98 and I09 and the blades HI and H2 secured thereto toward one another and in juxtaposition with the'table I02. The blades III and H2 are normally urged toward the supports H3 and H4 by means of torsion springs I25 which encircle the shafts I08 and I09 between the rear bearing I04 and arm I22 and between the rear bearing I05 and the arm I23. These springs are anchored to the said bearings and to the arms and maintain the said arms in contact with the cams H8 and H9 when the cams are in position to be engaged thereby. The cam H8 is constructed with a notch I26 and the'cam H9 is likewise constructed with a notch I21. These notches serve to partly release the blades II I and H2 for a purpose to be presently more fully described.

The shaft 28 of the invention serves as a drive shaft and is provided with a crank I28 by means of which the same may be rotated. This shaft has attached to it a sprocket wheel I29. A chain I3I passes over this sprocket wheel and over another sprocket wheel I32 fast to the shaft H'I. By means of this construction, shaft H1 is rotated in correspondence with the shaft 28.

The feeding mechanism C is operated in the following manner: Arm 84 extends upwardly above the shaft 88 and has pivoted to it by means of a pintle or bolt I33 alongitudinally extending link I34. This link is pivoted to an arm I35 by means of a similar bolt or pintle I36. The arm I35 is attached to shaft H1 and the link I34 is disposed upon the exterior of the arm I35 so that said arm may make a complete revolution as the shaft H'I revolves. The arm I35 is relatively short, as compared to the distance between the pintle I33 and shaft 82 so that the arm 84 is caused to rock while the arm I35 makes a com .of table I02.

roll I 39 of a length greater than the combined lengths of the faces I31 and I38 of said rolls. The roll I39 is preferably constructed of rubber or some similar resilient material, whereby uniform pressure may be had between the rolls of the pressing mechanism F to procure uniform pressing of the folder portions of the sheet. The roll I39 is attached to a shaft I4I which is journaled in two bearings I42 and I43. These bearings are mounted in two levers I44 and I45 which are identical with the levers 5| and'5220 previously referred to. These two levers are mounted for oscillation upon the shaft 53 previously referred to and are held in position longitudinally thereon by means of collars I46. These levers are urged downwardly in a manner simi-. 5

lar to the levers 5| and 52 by means of compression coil springs M! which encircle bolts I48 attached to the cross bar 64. By means of said springs the roll I39 is urged upwardly into engagement with the rolls 32 and 33 to provide suit-.

able pressure between the same.

For the purpose of relieving the pressure between the rolls 26, 21, 32, 33 and I 39 a releasing device indicated in its entirety by the reference numeral I50 is employed. This device consists..35

of a rod I49 which is constructed at its ends with offset portions I5I joumaled in bearings I52 formed in the longitudinal framemembers I5 and I6. One of the offset portions I5I of the rod I49 has attached to it a thumb piece I60 by meansm o of which said rod may be manipulated. When the rod is in the position shown in Fig. 2 the various springs are free to act upon the levers and the rolls are all brought into engagement. When the finger piece I60 is turned and rod I49 rotated.v

through an angle of 180 degrees, all of the levers are raised and the rolls freed from one another. Such construction permits of sliding the rolls for the purpose of adjusting the width of the score lines formed by the creasing mechanism A and also permits of removing paper which is improperly passing through the rolls.

The scored sheet after having been folded by the folding mechanism D is fed'by means of feed mechanism E to the pressing mechanism This feed mechanism will now be described in detail.

The table I02 is constructed at the center of the same with an offset portion I53 forming a groove I54 in the same. constructed with an opening I55 in therearward end thereof which extends up to the bearings H5 and H6 and past the arms I22 and I23 permitting said arms to swing freely. The opening I55 extends into the offset portion I53 of the table I02 as indicated at I56 to receive a pusher device indicated in its entirety by the reference numeral I51. This pusher device comprises a slide I 58 disposed below the offset portion I53 provided with a depending flange I59. This de- -7.5

The table I02 is alsoa:60

This slide is slidably mounted bepending flange has Securedto it an upwardly extending plate I65.-J Plate. I65:is provided with two spaced parallel bosses I66 and I61 which are drilled to provide two longitudinal parallel bores, not shown in the drawings. These bosses are further threaded to receive set screws 168. The pusher device I51 includes a pusher plate I69 which is constructed with two rearwardly extending rods HI and I12. Theserods pass through the bores in the bosses I66 and I61 and may be .adjustably held in position with respect to said bosses by means of set screws I68. .The lowermost portion I13 of this plate is constructed to enter .the slot I54 and is so constructed for the purpose of preventing the folded sheet lying upon the table I02 from slipping beneath said pusher plate when the pusher plate is operated. It will be noted that the table I02 is substantially at the, locality of tangency of theroll I39 and the rolls- 32 and 33. It will thus be readily comprehended that as soon as the pusher device I51 advances the paper to these rolls, that the paper is picked up and progressed through the rolls by means of the friction created between the same. The pusher device I51 is operated by means of a cam I14 which is attached to; shaft II! by means of a screw I15. This cam is spiraled in form and engages the plate I65-between the two bosses I66 and I61. As shaft II1 rotates the cam I14 moves the pusher plate I69 toward the presser mechanism F. A tension coil spring I16 secured at one end to a lug I11 on the end of the slide I56 and at its other end to a lug I16 on the offset portion I63, serves to move the pusher device I51 back to normal position when the cam I14 passes plate I65. u V Y The sheets discharged from the presser device .F are collected in the receptacle G previously referred to. This receptacle is constructed with a bottom I8I and spaced parallel side walls I82. These side walls are connected -to the bottom by a vertical front'wall I83 and an inclined rear wall I64. The receptacle is of such a width asto be easily received between the two frame members I5 and I6 andv is so designed that the rear wall I84 thereof may be brought into'close proximity to the roll I39. The pressed sheets upon leaving the pressing mechanism F are deposited into receptacle G and the ends of the same slide down theinclined wall I84 into position upon the bottom I8I and upon the last deposited sheet within the receptacle. The receptacle may be' easily removed by sliding the same forwardly from its position'shown in Fig. 2. 1 i

The operation-of the inventionis as follows: The stack of sheets 65 is placed upon the bottom 68 of magazine B and the end gauge I85 adjusted so that the leading edges of thesheets 66 of the stack come in close proximity to the lip 69 of said bottom. The two side register gauges 12 and 13 are next adjusted so that the sheet is disposed medially of the device. These gauges are so positioned that the friction pads 11 engage the edges of thesheets and exert an appreciable amount of pressure upon the same. With the parts so arranged the sheets are firmly held in position. The pressure on the rolls of the creasing mechanism and the pressing mechanism is next released by means of the finger piece I60. v

Scoring rolls 26 and 21 are next adjusted so that the creases or score lines formed in the sheet occur at the proper localities. This is accomplished by loosening set screws Y42 and 43 and by sliding said rolls to the proper'positions Vshaped ridges 29 on the rolls 26 and 21.

and the rolls 32 and 33.

1 and II4.

1 remains in its original position.

ranc es upon shaft 28' and by thereafter tightening said set screws. 'Rolls' 32 and 33 are loose upon the shaft 34 and are slid along said shaft until the .V shaped grooves 3| therein register with the releasing mechanism is now manipulated by turning finger piece I60 until the rod I48 is re- .leased from the various levers with which it cooperates. This creates pressure between the various rolls and the device is now ready to operate.

Upon rotation of the crank I28 the feed mechanism C is operated and the feed roller 92 moves the sheets one at a time out of the stack 65 and brings said sheets in between the rolls 26 and 21 The uppermost sheet indicated by the reference numeral 61 has been shown as just ready to be engaged by these rolls. Whenthe stack 65 is high the uppermost sheets are substantially at the elevation of the points of tangency of the rolls of the creasing mechanism A. As the stack becomes reduced in height, the uppermost sheets engage the lip 69 and are directed upwardly into proper position to be engaged by the creasing mechanism. As soon as the scoring rolls catch the sheet being fed by the feed mechanism C, the rate of travel of the sheet Is increased and the roller 92 is moved away from the blade 91 of the feed mechanism. When this occurs the roller travels freely and the sheet is progressed through the creasing mechanism without interference from the feed mechanism. As the sheets pass through the creasing mechanism, score lines or creases are formed at the proper. localities in the'sheets and the sheets so formed are deposited upon the table I02 between the-blades III and H2 of the folding mechanism D. One such sheet is shown in Figs. 5 to 10 and .is indicated by the reference numeral I9I This sheet is scored along two lines I92 and I93 forming two flaps I 94' and I 95 at the sides of the sheet and an intermediate portion I96 between said flaps. Due to the weight of the sheet the intermediate portion I96 rests upon the table I02 and the two flaps I 94 and I95 rest upon the blades III and H2 and upon the supports II3 As the shaft 26 rotates, shaft II1 travels with it and cam H9 is first brought in action. This cam engages the arm I22 and moves the blade downwardly, folding the flap I94 upon the intermediate portion I96 of sheet I9I. The relation of the parts after this operation is completed is shown in Fig. 6. In this figure it will be noted that the flap I94 rests upon the intermediate portion I96 and that the flap I95 still In the folding of the flap I94 it frequently occurs that the portion of the sheet adjacent the score line I93 is moved toward the shaft I09 to such an extent that the blade II2 could not effectively fold over flap I95. For this reason, it is necessary that the paper be permitted to travel back toward the shaft I68 if the paper had so traveled during the folding of flap I94. To accomplish this result, the cam H8 is constructed with the notch I26 previously referred to. When this part of the cam engages the arm I22, blade I I I is slightly released and the said blade and flap I94 raised upwardly somewhat as shown in Fig. 7. Upon further rotation of shaft I I1, cam I I9 comes into action and engages the arm I23 moving the said arm and turning blade I i2 about shaft I09. This occurs until the parts become disposed, as shown in Fig. 8. In this position the flap I95 overlies the flap I94 and the blade II I. Further rotation The:

2,12 ,138: of shaft II'I releases cam IIB from: arm I22 and blade becomes released therefrom. Upon return of blade III to normal position, theportion of cam II9 having the notch I21 engages the arm I23'and also slightly releases the blade I I2. The

position of the parts after thisoperationhas been,

completed is shown in Fig. 10. .-In order that the sheet be moved from the folding mechanism D to the pressing mechanism F, it is necessary that the pressure on the sheets brought about by blade I I2 be slightly released. Cam I'M now comes into action and commences to move the pusher device I51 forwardly. The portion I'I3'of pusher blade I69 now engages the folded sheet and ad-;. vances the same along until the said-sheet is .en-; gaged by the presser mechanism F. The sheet. then passes between the rolls 32,33 and I39 andis,

discharged into the receptacle G... Themachine is so timed that as soon as the .creasedsheet leaves the creasing mechanism A, the feed mechanism C commences to move rearwardly. The rolls 26 and 21 are also of such diameter that a single revolution of the same will cause the maximum size sheet to pass completely through the creasing mechanism.

Although I have described the invention as operated by hand, it can readily be comprehended that an electric motor may be used and suitable reduction gearing employed, whereby the shaft I28 may be continuously driven.

The advantages of my invention are manifest. An extremely simple and practical device is provided by means of which sheets may be folded for the purpose of insertion into envelopes. With my machine the sheets are quickly and accurately folded so that the same may be easily inserted into the envelope. The device can be operated either by hand or by power and is of suitable dimensions so that the same can be readily used in an office or any other desirable place of business. The device will handle any type of sheets such as are now used in correspondence and the same may be used to make one or two folds as desired. By means of the pressure mechanism used the folded sheets come out relatively fiat so that the same are easy to insert in the envelopes. The

device is practically foolproof and will not readily get out of order. By manipulation of the release the pressure on the rolls can be removed so that adjustment of the device is readily accomplished and removal of sheets from between the rolls is easily accomplished when the occasion demands. The receptacle for the folded sheets is readily removed from the machine whenthe same becomes filled.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent, is:

1. In a folding machine, a pair of scoring rolls, a folding mechanism adjacent said scoring rolls, said scoring rolls delivering scored sheets to said folding mechanism, a presser roll cooperating with one of said scoring rolls, and means for feeding the sheets from said folding mechanism to said second named scoring roll and said pressing roll.

2. In a folding machine, a creasing mechanism,

creasing mechanism and .saidpressing mechanism, .said creasingmechanism discharging scored sheets ,t0"said-f01ding mechanism, and feed means forreversing the direction oftravel of the sheets and removing sheets from said foldingmechanism and delivering them tosaid pressing mechanism. Y

3. In a folding*mach-ine, a table on which sheetsto be folded are deposited, a pair of spaced parallel shafts having their axes.v close ,to said table, blades carried by said shafts and movable from extendedspositionsto positions in close proximityto said table, arms secured to said shafts, an operating shaftandcams on said operating shaftlandoengaging said arms, said cams being arranged on said operating shaft to procur'esuccessive movement of said arms to successivelyv swingsaid blades into engagement with the portionsgofv the sheet deposited. thereon for successively foldingasaid portions of the sheet one upon the other, a slide guided for movement parallel with said. bladesiand blade shafts, a pusher platecarriedbyjsaid slide and engaging the folded sheet to move thesame longitudinally alongsaid table, and means on said operating shaft for moving said pusher plate.

4. A folding machine comprising a framework, a magazine for sheets carried by said framework and disposed near one end thereof, a creasing mechanism intermediate the ends of the machine, means for feeding sheets from. the magazine to said creasing mechanism, a folding mechanism at the other end of the machine and carried by said frame and to which creased sheets are delivered from said creasing mechanism, a pressing mechanism carried by said frame and disposed in proximity to said creasing mechanism, feeding means for reversing the direction of travel of the sheets and for delivering the folded sheets to the pressing mechanism, and a receptacle for folded sheets positioned below said magazine and to which the delivered.

5. In a folding machine, a horizontal support, a creasing mechanism adjacent one end of said support and discharging creased sheets on said support, means on said support for folding the creased sheets delivered thereto, a pressing mechanism at the same end of the support as said creasing mechanism, and feed means for feeding the folded sheets from the support to said pressing mechanism.

6. In a folding machine, a revoluble member having a concentric circular ridge thereon, a. cylindrical roll having a circular concentric groove in the periphery thereof contacting with said ridge to crease sheets passing between said ridge and groove, folding means adjacent said revoluble member and roll for folding the sheets creased thereby, a second roll having a cylindrical surface contacting with the cylindrical surface of said first roll to press sheets passing therebetween. and means for feeding folded sheets from said folding means in between said first and second rolls.

7. In a folding machine, a revoluble member having a concentric circular ridge thereon, a cylindrical roll having a circular concentric groove in the periphery thereof contacting with said ridge to crease sheets passing between said ridge and groove, folding means adjacent said revoluble member and roll for folding the sheets creased thereby, a second roll constructed of a resilient pressed sheets are roll to press sheets passing therebetween; and means for feeding folded sheets from said folding means in between said first and second rolls.

8. In a folding machine, a magazine for sheets, a receptacle for folded sheets beneath said magazine, folding means to one side of said magazine and receptacle, feed means for feeding the sheets away from the magazine to the folding'means, and feed means for feeding the folded sheets from the folding means back toward the magazine and into the receptacle.

9. In a folding machine, a horizontally extending frame, a magazine for sheets at one end of the frame, creasing rolls intermediate the ends of the frame, a folding device at the other end of the frame and on the opposite side of said creasing rolls, means for feeding sheets from the magazine to the creasing rolls, said creasing rolls delivering the creased sheets to said folding device, said magazine being elevated, and means for feeding the folded sheets fromrsald folding device back underneath said magazine.

10. In a folding machine, a table on which sheets to be folded are deposited, a pair of spaced parallel shafts having their axes close to said table, blades carried by said shafts and movable from extended position to positions in close proximity to said table to fold sheets'placed upon said blades and table, anoperating shaft disposed near the ends of said first shafts, means on said operating shaft for moving said blades to fold the sheets, an ejecting member, means for guiding said member for movement in a direction parallel with said first shafts to eject a folded sheet from said blades and means operated by said operating shaft for actuating said ejecting member.

11. In a folding machine, a shaft, two revoluble members on said shaft, each of said members having a circumferential circular ridge, means for adjustably securing one of said members to said shaft at various positions along said shaft, a second shaft parallel with said first shaft, two rollers on said second shaft, grooves in said rollers cooperating with said ridges, and means for adjustably securing one of said rollers to said shaft at positions along the shaft corresponding to those of the adjustable revoluble member.

KARL F. RIESE.

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