US1891391A

US1891391A - Cutting and creasing presses for paper, cardboard, or the like

Info

Publication number: US1891391A
Application number: US492925A
Authority: US
Inventors: Nasmith John Irving
Original assignee: Vickers Armstrongs Ltd
Current assignee: Vinters Armstrongs Ltd
Priority date: 1930-10-09
Filing date: 1930-11-03
Publication date: 1932-12-20
Anticipated expiration: 1949-12-20
Also published as: DE599350C; GB359189A

Description

Dec. 20, 1932. J, NASMITH CUTTING AND CREASING PRESSES FOR PAPER, CARDBOARD, on THE LIKE Filed Nov. 5; 1930 6 Sheets-Sheet I Dec. 20, 1932. I J. 1. NASMITH 1,891,391

CUTTING AND CREASING PRESSES FOR PAPER, CARDBOARD, OR THE LIKE 1 Filed Nov. 3, 1930 6 Sheets-Sheet 2 J. l. NASMITH Dec. 20, 1932.

CUTTING AND GREASING PRESSES FOR PAPER, CARDBOARD, OR THE LIKE Filed Nov. 3, 1950 6Sheets-Shee't 5 19. 20, 1932. J NASWTH 1,891,391

CUTTING AND CREASING PRESSES FOR PAPER, CARDBOARD, OR THE LIKE Filed Nov. 3, 1950 6 Sheets-Sheet 4 I a Q Dec. 20, ["NASMlTH 1,891,391

CUTTING AND CREASING PRESSES FOR PAPER, CARDBOARD, OR THE LIKE Filed Nov. 5, 1930 6 Sheets-Sheet 5 Dec. 20, 1932. .1. 1. NASMITH CUTTING AND CREASING PRESSES FOR PAPER, CARDBOARD, OR THE LIKE Filed Nov. 3, 1930 '6 Sheets-Sheet 6 fix Patented Dec. 20, 1932 UNITED STATES PATENT oFFrc I .IoIIN IRVING NASMITH, on ERITH, ENGLAND, ASSIGNOR r vIcKEns-AnMsrRoNGs LIMITED, or WESTMINSTER, ENGLAND, a :snrrisn COMPANY CUTTING AND CREASING PRESSES F Application filed November 3, 1930, Serial No This invention relates to cutting and creasing presses of the platen type for paper, cardboard or the like (hereinafter referred to for the sake of brevity as paper). In cutting and creasing presses of the platen type for use for example in making folding boxes or the i like the cutting die or forme is mounted in a steel frame known as the chase. The chase and its contents are placed in the machine and rest against a plane faceprovided on the bed of the machine. A second approximately plane face is provided on a member known as the platen which is moved relatively to'the framework in such a manner that the sheets of paper may be laid on the platen face and be carried thereby towards and pressed against the forme.

The chief object of the present invention is to provide an improved means for mechanically feeding a sheet of paper or the like'to the platen. In a known form of machine for mechanically feeding the paper to the platen, feed rol s are provided upon or adjacent to the feeding end of the feed table, and the paper in its movement towards the platen is free or uncontrolled. The present invention provides for the sheet being fed under a positive control from the moment at which it is taken from the feed table to the moment at which it is pressed against the forme and also provides a longer period of time within which the operation of feeding the paper to the platen may take place.

According to the invention feeding means are rovided for feeding sheets of paper directlv in a rectilinear manner to the platen and in aplane substantially parallel thereto the said means and its actuating mechanism are mounted upon the platen and move therewith during the movement of the platen to and from the forme. The feeding means preferably comprise a pair of rolls one of which is positively driven about a fixed axis and the other of which is adapted to be intermittently moved into contact with the sheet of paper to press the latter against the positively driven roll for the purpose of feeding the paper forward. The movement of the movable roll is preferably controlled by on PAPER, CARDBOARD, on 'rnnmkr:

. 492,925, and in Great Britain October 9,1930.

meansof a cam mounted upon the platen and adapted angularly to displace the feed roll into thefeeding position at the appropriate moment. It is preferred to provide means which serve to arrest or delay the forward movement of the paper towards the end of its movement to the platen and to provide means which are adapted to be brought into operation to engage'preferably the rear edge of the sheet of paper in order finally to locate the paper in its correct position relatively to the platen.

In order that the saidinvention may be,

clearly understood and readily carried into effect the same will now be, more fully, described with reference to the accompanying drawings, in which V v Figures 1 to 5 are diagrammatic views showing the sequence of operations of the machine;

Figure 6 is a side elevation of the machine Figure 7- is a front elevation thereof;

Figure 8 is a detailed side elevation showing the manner of operating and mounting the feed rolls;

Figure 9 is a detailed side elevation of the means for arresting the movement of the paper: and Figure 10 is a detailed side eleva+ tion of the means which finally positions the sheet after it has been fed on to the platen.

Referring now more particularly to Figures-1 to 5 of the drawings the sheets of paper to be operated upon are placed as a horizontal pile in a convenient position on a feed table of the mach ne. Each sheet is successively, laid on the feed table and may be arranged against back and side stops not shown on the drawings, with the front edge of the sheet proiecting beyond the front edge of the feed table to enable it to be engaged upon by the feed mechanism according to the invention. A indicates the platen of-the masheet of paper G, lying on the feed table is pressed. Feed rolls-G grip the forward edge of the paper atthe appropriate time when-the chine and B the forme against whichthe parts are substantially in the position shown in Figure 1 and feed the paper forward on to the platen. In the'position shown in Figure 1 the sheet G which has been previously operated upon has been stripped from the forme by means of strippers F which form no part of the present invention. After the sheet of paper has been fed forward on to the platen and towards the end of its travel the movement of the paper is retarded or arrested by means of a braking mechanism indicated by the reference letter D. This position is shown in Figure 2 and the sheet of paper G which has been previously operated upon is released by the strippers F and falls between the forme B and platen A as shown. The sheet of paper is finally positioned relatively to the forme B by means of grippers E which engage the rear edge of the sheet as the platen A approaches its end of travel towards the forme this position being illustrated in Figure 3. The sheet of paper is then pressed against the forme as indicated in Figure 4 and thereafter the platen moves away from the forme and the strippers F are operated to strip the paper from the forme the next sheet'of paper to be operated upon being placed in position on the feed table X by the operator. f s

The feed rolls. braking and gripping mechanisms are mounted upon the platen and derive their motion from a crankpin 11 which operates the platen B by means of connecting rods H as are commonly employed in this type of machine, the crankpin 11 having continuous uniform motion about the centre 12 and is driven from a suitable source of power. A chain sprocket wheel 12 is rigidly secured to the crankpin 11 and revolves once in space for every revolution of the crankpin. The wheel 12 drives by means of a main driving chain 12 a second sprocket wheel 13 mounted loosely on a pin 14 co-axial withthe platen connecting rod centre. The pin 14is carried by a bracket 15 which is rigidly secured to the platen casting the bracket 15 also carrying a pin 16 for anidler gear 17 driven from the spur wheel 18 integral with the sprocket wheel 15. The idler gear 16 meshes with a gear wheel 19 mounted on the end of a shaft 20 which is the actuating shaft for all the subsidiary mechanisms mounted on the platen. The shaft 20 is carried by three brackets 21 (Figure 7) bolted to the platen casting. The bracket 15 also acts as an outer bearing for the shaft 20. Geared to the shaft 20 is a spur gear 22 which drives a compound gear 23 carried on a stud secured to the side of the platen casting which in turn drives a gear 24 integral with a sprocket wheel 25 and loosely mounted on the shaft 20 the compound gear 23 being introduced in order to obtain the correct speed ratio. The sprocket wheel 25 drives by means of a chain 26 a sprocket wheel 27 which is keyed or otherwise suitably secured to the upper feed roll spindle 28. The feed roll spindle 28 carries the upper feed roll 29 the spindle being mounted in and can ried by two brackets 30 secured to the sides of the platen which brackets also carry the pivot pins 31 upon which plates 32 are pivoted which carry the lower intermittently operated feed roll 33.

A jockey sprocket Wheel 12 is provided mounted upon the end of an arm 12 which is pivoted on the connecting rod H and is normally urged into contact with the main driving chain 12 by means of the spring 12 The purpose of the jockey sprocket 12 is to accommodate the difierent relationship of the sprocket centres of the sprockets 12 and 13 but since this forms no part of the present invention further description is thought to be unnecessary. It should be mentioned however that owing to the relative rotation of the sprocket wheel centres on'the crankpin and platen respectively the rotation of the latter (and consequently of the wholetrain of gears) is not uniform but this is of little or no importance for the purpose required so long as the effect due to this has been allowed for where it influences time relationships.

Mechanism for opening and closing the feed rolls 29 and 33 is shownin detail in Figure 8 and as previously mentioned the upper feed roll 29 is carried by a spindle 28' mounted in brackets 30 attached to the sides of the platen and braced by the bolt 34. The

brackets 30 carry pivot pins 31 on whichthe plates 32 carrying the lower feed roll 33 are pivotally mounted the plates 32 being braced by the rod 35. The lower feed roll (01' rolls) 33 is loosely mounted upon a spindle 36 supported on the pivoted plates 32. The pivoted plates 32 are adapted to be turned about the pivots 31in order to cause the lower feed roll to press the paper against the upper roll 29 for the-purpose of feeding the paper forwardly on to the platen. A table stop X may be provided on the feed table X and against which the paper is. ar ran ed by the operator; In order to actuate the plates 32 the latter are connected by means of pins 37 to connecting rods 38 which carry rollers 39 which contact with the surfaces of cams 40 keyed or otherwise suitably secured to the shaft 20. In the position shown in Figure 8 the feed rollers-are about to close the platen being practically station-' ary at this time and the edge of the sheet lying onthe feed table being located between the rolls as shown in Figure 1 the angle of approach of the feed rolls to the feed table being such that an ample gap is provided between the feed rolls in open position. As soon as the platen commences to move from the position shown in Figures 1 and 8 towards 'the forme the feed roll 33 moves towards the roll 29 due to the rollers 39 passing over the peaks of the cams 40 under the influence of springs 41 which are connected tothe plates 32 and to the brackets 30. The feed rolls remain in the closed position-long enough to feed the widest sheet required and they are then gradually openedon the return of the platen from the closed position under the action of the cams 40. The pressure exerted by the springs 41 may be made adjustable by means of the screws 42. After the sheet has passed through the feed rolls the travel of the sheet relatively to the platen face is retarded or arrested by the means referred to in detail in Figure 9. Two

brackets

43 and 44 are secured to the edge of the platen and mounted for sliding movement relatively to the brackets are lower brake fingers 45. The upper brake fingers 46 are carried by the rod 47 which is mounted in the brackets 30. The lower brake fingers 45 act through the medium of spring pres.

sure, the pressure between the brake fingers being initially adjusted by means of screws 48. The lower brake fingers 45 are actuated by levers 49 pivoted 011 pins 50 carried by the

brackets

43 and 44. The levers 49 are connected to the fingers 45 by means of pin and slot connections as shown. The levers 49 are connected together by means of a rod 51 which is actuated at its centre by means of a connecting block 52 which is connected by a rod 53 to an actuating block 54. The block 54 carries a roller 55 which contacts with a cam 56-mounted on the shaft 20. The cam 56 is readily adjustable relatively to the shaft 20 by means of a screw 57 co-acting with a toothed portion of the shaft 20 so that the time of closing of the brakes may be varied within limitsrelatively to the remainder of the time cycle, this being necessary to accommodate the various widths of sheet fed to the machine. The smaller the width of sheet the earlier in the cycle will.

the brakes have to come into action. By this adjustment the brake fingers may be made to close immediately after feeding is completed. The front edge of the sheet is guided from the feed roll so as to pass'through the gap existing between the brake fingers when they are open. After the brake mechanism has functioned the rear edge of the sheet is situated between the face of the brake fingers but the position may not necessarily always be the same, as between sheet and sheet, nor necessarily accurately square in its relation to the platen. Therefore the sheet must be further positioned relatively to the forme and located to cause it to assume a position in which it is clear of the mechanism above described as the latter must of necessity be arranged so that it projects above the top of the forme when the platen is closed in order to avoid contact with the forme. For this purpose means in the form of grippers are provided which engage the edge of the sheet and remove it from the brake mechanism' and accurately dispose it relatively to the forme.

The said means or grippers are indicated in detail in Figure 10, and comprises gripper bodies 58 havin upper and lower jaws and rigidly mounted on a shaft 59 carried by brackets 60 secured to the top edge of the platen. The upper jaws 61 of the grippers are pivoted on pins 62 and are normally maintained in contact with the lower jaws 61 by adjustable springs 63. The grippers operate close against the side of the brake fingers and the jaws of the grippers have suitable lips formed on them to assist the entry of the sheet when the grippers are moved forward to engage it. The grippers are disposed in their inoperative position below the level of the sheet being fed and do not move relatively to the platen until the sheet has been arrested or retarded by the brakes. The

brake fingers

45 and 46 hold the sheet while thegrippers engage its rear edge the latter opening the jaw 61 and allowing the jaws to embrace the edge of the sheet. The sheet is thus moved positively forward by the motion of the grippers and theedge of the sheet passes out of the brake shoes and is then controlled by the grippers which move forward into a position which brings the sheet into correct register with the forme. As soon as theplaten closes against the forme the platen grippers retract from the front edge of the sheet and move back to their initial position as the platen opens. In-order to impart the required motion to the grippers the shaft 59 is oscillated through the appropriate angle and at the appropriate time by means of a double cam 64 which operates links 65 due to contact of the surface of the cams with rollers 66 carried-by the links 65 the links being connected to the ends of a double armed lever 67 keyed to the shaft 59. Thedouble cam has been employed only as a constructional measure in order to obtain accurately timed motion in both directions and it must be understood that other means may be employed for oscillating the shaft 59.

It is to be understood that the term forme referred to in the appended claims is intended to cover broadly the plane face provided v on the bed of the machine against which the chase and its contents rest.

' lVhat I claim and desire to secure by Let ters Patent of the United States is 1. In a cutting and creasing press comprising a platen and forms, the provision of means for feeding sheets of paper directly in a rectilinear manner to the platen andin a plane substantially parallel thereto, said means and its actuating mechanism being mounted upon the platen and moving therewith to and from the forme.

2., A cutting and creasing press coinprising a platen and forms, a positively driven member-mounted upon the platen, a movable member'mounted upon the platen and adapted to be moved intermittently towards the T means for moving the platenftowards and away from the forme and .meansmounted on the platen for actuating'the said-members. 1

'3. A cutting and creasing press comprising a platen and forme, a positively driven roller mounted upon the platen,-a movable roller mounted upon the platen and adapted to be moved intermittently towards the driven roller, means for moving the platen towards and away from the forme and means mounted .on the platen for actuating said rollers.

4. A cutting and creasing press comprising a platen and forme, a positively driven member mounted upon the platen, a member adapted to be moved intermittently towards the driven memberto press a sheet of paper into contact with the positively driven member, a pivoted arm upon which said intermittently movable member is mounted, and means mounted on the platen for causing the arm to move about its pivot to cause the intermittently movable member to approach or recede from the positively driven member.

5. A cutting and creasing press comprising a platen and forme, means mounted on the platen for feeding sheets of paper between the platen and forme and means for retarding or arresting the movement of the paper towards the end of its travel over the surface of the platen.

"6. A cutting and creasing press comprising a platen and forme, means mounted on theplaten for feeding sheets of paper between the platen and the forme and means mounted on the platen for retardingor arrestingthe movement of the paper towards the end'of its travel over the surface of the platen.

7. A cutting and creasing press comprising a platen and forme, a positively driven member mounted upon the platen and a member adapted intermittently to be'moved toe wards said driven member, means mounted upon the'platen for retarding or arresting the movement of the paper'towards the end of its travel over the platen and means mounted'on the platen for actuating said positively driven member, said intermittent-s ly movable member and said retarding or arresting means.

8. A cutting and creasing press comprising a platen and forme, means mounted on the platen for feeding sheets of paperbetween v the'platen and the forme and a pair of fingers one of which is movable to engage the paper to arrest or retard its movement towards the end of its travel over the surface of the platen.

9. A cutting and creasing press comprising a platen and forme, a positively driven member mountedupon the platen and a member adapted intermittently to be moved to- 'wards said driven membena pair of fingers and m'eans mounted upon'the platen for moving one of said fingers to engage the paper to arrest or retard its movement towards the end of its travel over the surface of the platen.

10. A cutting and creasing press comprising a platen and forme, means comprising a positively driven member mounted upon the platen and a member adapted to be intermittently moved towards said driven member for feeding sheets of paper between the platen and the forme and means for finally positioning the paper relatively thereto.

11. A cuttingand creasing press comprising a platen and forme, means comprising a positively driven member mounted upon the platen and a member adapted to be intermittently moved towards said driven member for feeding sheets of paper between the platen and the forme and means mounted upon the platen for finally positioning the paper relatively thereto. I

I 12. A cutting and creasing press comprising a platen and forme, means mounted upon the platen for feeding sheets of paper between the platen and the forme, means mounted upon the platen for retarding or arresting the movement of the paper towards the end of its travel over the surface ofthe platen and means mounted upon the platen for finally positioning the paper relatively thereto.

13. A cutting and creasing press comprising aplaten and forme, means comprising a positively driven member mounted upon the platen and a member adapted to be intermittently moved towards said driven member for feeding sheets of paper between the platen and the forme and gripping means mounted on the platen adapted to contact with the rear edge of the sheet of paper for finally positioning the paper relatively to the platen and means mounted upon the platen for moving the gripping means into contact with the paper.

14:. A cutting and creasing press comprising a platen and forme, a positively driven roller mounted upon theplaten, a movable roller mounted upon the platen and adapted to be moved intermittentlytowards the driven roller. means for moving the platen towards and away from the forme, means mounted on the platen for aetuatingsaid rollers, gripping means mounted on the platen adapted to contact with the rear edge of the sheet of paper for finally positioning the paper relatively to the platen and means mounted on the platen for moving the gripping means into contact with the paper.

' 15. A cutting and crcasingpress comprising a platen and forme, means mounted on the platen for feeding sheets of paper betweenth'e platen and the forme, gripping means normally lying below the plane of the platen and mounted on the platen adapted to contactwith the rear edge of the sheet of paper for finally positioning the paper relatively to the platen and means mounted on the platen for moving the gripping means into contact with the paper.

16. A cutting and creasing press compris' ing a platen and forme, means mounted upon the platen for feeding sheets of paper between the platen and the forme, gripping means mounted upon the platen for finally positioning the paper relatively thereto and adapted to engage the rear edge of the sheet of paper, said gripping means comprising a pair of fingers mounted upon a member attached to a shaft and means for oscillating said shaft to move the gripping means into the path of the rear edge of the sheet of paper.

17. A cutting and creasing press comprising a platen and forme, means mounted upon the platen for feeding sheets of paper between the platen and the forme, means mounted upon the platen for retarding or arresting the movement of the paper towards the end of its travel over the surface of the platen and means mounted upon the platen for finally positioning the paper relatively thereto, said last mentioned means comprising a pair of fingers mounted upon a member attached to a shaft and means for oscillating said shaft to move the said means into the path of the rear edge of the sheet of paper.

18. A cutting and creasing press comprising a platen and forme, means for feeding sheets of paper between the platen and the forme, a pair of fingers mounted upon the platen and means mounted upon the platen for moving one of said fingers to engage the paper to arrest or retard its movement towards the end of its travel over the surface of the platen and means for finally positioning the paper relatively to the platen comprising a pair of fingers mounted upon a member attached to a shaft and means for oscillatin the shaft to move the fingers into the path of the rear edge of the sheet of paper.

19. A cutting and creasing press comprising a platen and forme, a positively driven member mounted upon the platen and a member adapted intermittently to be moved towards said driven member, a pair of fingers and means mounted upon the platen for moving one of said fingers to engage the paper to arrest or retard its movement towards the end of its travel over the surface of the platen, and a gripping device for finally positioning the paper relatively to the platen comprising a pair of fingers mounted upon a member attached to a shaft and means mounted upon the platen for oscillating the shaft to move the gripping device into the path of the rear edge and sheet of paper.

20. A cutting and creasing press comprising a platen and forme, a positively driven member mounted upon the platen, a movable member mounted on the platen and adapted to be moved intermittently towards the driven member, a feed table upon which the sheets of' paper to be fed are arranged with the forward edge of the sheet of paper to be fed projecting from the forward edge of the table, said movable member being adapted to press a sheet of paper into contact with the positively driven member, means for moving the platen towards and away from the forme and means mounted on the platen for actuating said members.

21. A cutting and creasing press comprisin a platen and forms, a feed table upon which the sheets of paper to be fed are arranged, means mounted on the platen for feeding the sheets of paper between the platen and theforme and means for retarding or arresting the movement of the paper towards the end of its travel over the surface of the platen.

22. A cutting and creasing press comprising a platen and forme, a feed table upon which the sheets of paper to be fed are arranged, means mounted on the platen for feeding sheets of paper between the platen and the forme, means mounted on the platen for retarding'or arresting the movement of the paper towards the end of its travel over the surface of the platen and means mounted on the platen for finally positioning the paper relatively thereto.

23. A cutting and creasing press comprising a platen and forme, means mounted on the platen for feeding sheets of paper between the platen and the forme, means mounted on the platen for arresting or re tarding the movement of the paper towards the end of its travel over the surface of the platen, means mounted on the platen for finally positioning the paper relatively thereto, means for driving said above mentioned means through the medium of a connection with a crank which actuates the platen.

24. A cutting and creasing press comprising a platen and forme, a crank and a crankpin, a connecting rod connecting said crankpin to a pin mounted upon the platen, means mounted upon the platen for feeding sheets of paper between the platen and the forme, means mounted on the platen for retarding or arresting the movement of the paper towards the end of its travel over the surface of the platen, means mounted on the platen for finally positioning the paper relatively thereto, means mounted on the aforesaid crankpin connected to other means mounted upon the platen for driving said feeding means, retarding or arresting means and positioning means.

JOHN IRVING NASMITH.