US1204795A - Printing-press with automatic feeding of the pile of sheets. - Google Patents

Description

G. H. uNnsTRb'M.

PRINTING PRESS WITH AUTOMATIC FEEDING OF THE FILE 0F SHEETS. APPLICATION FILED MAY 5| |9l5.

1,204,795. Patented Nov. 14, 1916.

2 SHEETS-SHEET 1.

r IZ 8 .91 7 1 I a v i E 1. 3' g" I l f i 1 1 Q- .Bvnwsnlorve. H. LINDSTRb M. PRINTING PRESS WITH AUTOMATIC FEEDING OF THE FILE 0F SHEETS.

APPLICATION FILED MAY 5, I915.

Patented N 0v. 14, 1916.

2 SHEETS-SHEET 2- I? 722' near W @MMZJW UNITED STATES PATENT OFFIC GUSTAF HJALMAR LINDSTBOM, OF GOTTENIBORG, SWEDEN, ASSIGNOB TO AKTIE- BOLAGET PRINCEPS- F GOTTENBORG, SWEDEN, A CORPORATION OF SWEDEN.

PRTNTING PEESS WITH AUTOMATIC FEEDING OF THE PILE OF SHEETS.

To all whom it may concern:

Be it known that I, GUsTAF HJALMAR LINDSTROM, a subject of the King of Sweden, and resident of Engelbrektsgatan 38, Gottenborg, in the Kingdom of Sweden, have invented certain new and useful 1m: provements in Printing-Presses with Automatic Feeding of the Pile of Sheets, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a device for determining exactly the position of a sheet or the like to be printed in a press with automatic feeding of the pile of sheets. For this purpose so called feed squares that is to say T-squares are generally used, the short shanks of which rest upon the feed table. The said feed squares are provided with adjusting screws which are passed through a slot in the table plate and by means of which the squares are secured at suitable points of the said slot. This arrangement, however, has the disadvantage of the position of the papersheets or the like being not exactly determined, for the reason that the top sheet does not always bear closely against the squares at the moment when the feeding device seizes it, and also for the reason that the squares sometimes occupy a somewhat inclined position either by their being incorrectly manufactured or generally by their not being carefully screwed. When such printing is effected, in which the impressions to be made on the different sheets must be located exactly on corresponding spots and a difference of half a millimeter or one third of a millimeter is too great, it often happens that the work must be rejected, owing to the fact that the top sheet will rest against a lower point of the squares according as the table plate is fed upward and the pile of sheets is worked up. If the said points are not located on the same perpendicular, the impression made on the lower sheets of the pile will be located nearer to or far ther from the edge of the sheets bearing on the squares than the impression made.

on the top sheets of the pile.

This invention has for its object to overcome the said disadvantage and consists substantially in spring devices or the like pushing, as the table is raised the top sheets Specification of Letters Patent.

against gages or the like which are fixed to the frame of the table and, consequently, do not partake in the feed movement of the table plate.

The accompanyingdrawing shows a form of the invention.

Figure 1 shows a part of the feed table with adjacent parts, viewed from the working side (the outer side of the machine). Fig. 2 is a side view of one of the gages (feed squares), and Fig. 3 is a vertical section taken in a plane between the tables, looking from the left to the right of Fig. 1, with the lever mechanism applied thereto in another position.

In the drawings I have shown only one side of a machine as it is sufficient for an understanding of my invention, but I wish Patented Nov. 14, 1916. 1 Application filed May 5, 1915. Serial No. 26,021.

it understood that a similar structure will be applied to the opposite side. The frame 1 comprises side pieces 21 having. arms 22 uprising therefrom, and a back 15 connecting the side pieces. This frame 1 is arranged to be moved upwardly and downwardly between brackets 23 carried by the main frame 24 of the machine, as shown in Fig. 3, by means of levers 25 mounted on a shaft 26 journaled in the brackets 23, from which levers 25 the arms 22 are suspended from a shaft 27 carried by the levers. The free ends of the levers 25 are provided with rollers 28 which are adapted to be actuated by a cam 29 fast on the shaft 30. This shaft 30 is mounted in the brackets 23 and rocked by any well known and approved means connected with the driving shaft (not shown) of the machine, which rocking .movement is transmitted from the cam 29 to the roller 28 and levers 25, thereby imparting to the frame 1 an upward and downward movement. The frame 1 is guided in its upward and downward movement by rollers 31, mounted on brackets 32 extending outwardly from the main frame 24, which rollers 31 are adapted to engage bearing surfaces 2 on the frame. From a vertical rod 1 provided in the frame 1 two arms 3 (one only being shown in the drawing) project ending in guides for the rods 4 carrying the proper table plate 5. Screw springs 6 are located between the parts 3 and 5 for imparting a soft motion to the table plate. The so called feel rulers 7 extend over the table plate 5. To the said feel rulers so called lateral adjusters 8 are Screwed, comprising the plate springs 9 which extend downward in an oblique direction at the side of the feel rulers. Small rectangular plates 12 of india rubber or the like and beveled at their lower ends are fixed to the outer ends of the springs 9 by means of screws 10 and small plates 11. As the table plate 5 is raised the top sheets 13 of the piles are forced against the plates 12. Owing to the fact that the plate springs 9 are thereby bent upward, they become. somewhat longer in lateral direction and, consequently, push the sheets 13 toward the so called feed squares 14. The said squares 14 consist of T-squares, the short shanks of which Fig. 2, rest against the top side of the so called back 15 of the frame 1 and are held by screws 16 passed through longitudinal slots parallel to the lane of the drawing and provided in the ack 15. At the under side of the-said back washers 17 are located on the said screws 16 which washers are provided with suitable guiding parts 18 in the same manner as the squares 14. To the heads 19 of the screws 16 handles 20 are pivoted for the turning of the screws. In the table plate 5 slots (parallel to the plane of the drawing) are provided, through which the squares 14 extend upward.

During the printing operation the rods 1 and consequently the table plate are fed upward according as the pile of sheets is worked up. The said feeding operation is controlled by the feel rulers 7 and is not described as it forms no part of this invention. Finally the plate 5 will strike directly the plates 12 when the last sheet hasbeen removed. But throughout the said feeding movement the sheets which for the occasion lie uppermost on the pile of sheets will always in their upper position be located exactly at the same points of the feed squares 14 owing to the fact that the said squares do not partake in the feeding movement. Consequently, if the said feed squares are somewhat inclined, this has no influence upon the position of the top sheet. Nor can any sheet be printed incorrectly, if the same is moved a little apart from the appertaining feed s uares by the motion of the machine, such afa ult being corrected immediately by the lateral adjusting device 8-12.

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

-1.. In a feeding device for printing presses, the combination of means moving the pile of sheets upward and downward to and from the level, from which the uppermost sheet is fed, stationary rules and means moving the uppermost sheet of the pile laterally and forcing it against the said rules, substantially as described and for the purpose set forth.

-which the uppermost sheet is fed, a rule stationary with relation to the said carrier, and means moving the uppermost sheet of the pile laterally and forcing it against the said rule, substantially as described and for the purpose set forth.

4. In a feeding device for printing presses, the combination of a carrier for the pile of sheets, means moving the carrier upward and downward to and from the level, from which the uppermost sheet is fed, a rule stationary w1th relation to the said carrier, and a yielding finger, against which the pile is forced, when moved upward, and which forces the uppermost sheet of the pile against the said rule, substantially as de scribed and for the purpose set forth.

In witness whereof, I have hereunto signed my name in the presence of two subscnbmg witnesses.

'GUSTAF HJALMAR LINDSTRilM.

Witnesses:

JOHN G. Cause, OSKAR FoRsBERe.

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