US1773094A - Bed and cylinder printing press - Google Patents

Description

Aug. 19, 1930. c. B. COTTRELL. 30 1,773,094

BED AND CYLINDER PRINTING PRESS Filed June 5, 1928 4 Sheets-Sheet l INVENTOR ATTORNEYS 4 Sheets-Sheet 2 INVENTOR ATTORNEYS Aug. 19, 1930. c. B. COTTRELL, 3D

BED AND CYLINDER PRINTING PRESS Filed June 5, 1928 ANN IlllfllA-llll Aug. 19, 1930. c. B. COTTRELL, 3D 1,773,094

BED AND CYLINDER PRINTING PRESS Fi led June 5, 1928 4 Sheets-Sheet 3 ATTORN EYS Aug. 19, 1930.

C. B. COTTRELL, 3D

BED AND CYLINDER PRINTING PRESS Filed June 5, 1928 4 Sheets-Sheet INVENTOR -W /.*/W 241 ATTORNEYS Patented Aug. 19, 1930 UNITED STATES PATENT QFFEE CALVERT B. COTTRELL, 3D, OF WESTERLY, RHODE ISLAND, ASSIGNOR TO C. B. COTTRELL 8c SONS COMPANY, OF WESTERLY, RHODE ISLAND, A CORPORATION OF DELAWARE BED AND CYLINDER PRINTING PRESS Application filed June 5, 1928. Serial No. 282,997.

My invention consists in a four revolutionbed and cylinder one color printing press in which a single impression cylinder of comparatively small size may be used, said cylinder being arranged to make four revolutions during a complete reciprocation of the bed; the cylinder making two revolutionsin one direction on the forward or printing stroke of the bed and two revolutions in the opposite direction on the return or non-printing stroke of the bed, the sheet being taken, printed and transferred to the sheet conveying means of the delivery mechanism during the first two revolutions of the impression cylinder on the forward or printing stroke of the bed and conveyed to and deposited on the delivery table during the last two revolutions of the cylinder on the return or nonprinting stroke of the bed.

The object of my invention is to materially reducethe weight and cost of the printing press and also to bring the feed and delivery mechanisms down into convenient position for the operator.

A motive fluid means is shown for reciprocating the form bed, such means forming the subject matter of my copending application filed of even date herewith, its serial number being 282,998.

A practical embodiment of my invention is represented in the accompanying drawings, in which Fig. 1 represents the printing press in side elevation with the parts in the positions they assume when the form bed is about to start on its forward or printing stroke, the impression cylinder is about to take a sheet from the feed board and the printed sheet is being deposited on to the delivery table by the conveying means of the delivery mechanism.

Fig. 2 represents an enlarged detail side view of the impression cylinder and its adj acent parts, showing more clearlythe several devices operated-by the bed for controlling Lthe feeding and delivery of the sheets, the

parts being in the positions shown in Fig. 1.

Fig. 3 represents a detail cross section taken in the planes of the line IIIIII of Fig.

2, looking'in' the direction of the arrows.

Fig. 4 represents a detail longitudinal sec.

tion taken in the plane of the line IV-IV of Fig. 3, looking in the direction of the arrows with the parts in the positions they assume when the leading edge of the sheet is revolution impression cylinder by 4 and its sheet grippers by 5. The usual inking table on the form bedis denoted by 6, the ink dis-"- tributing rollers by 7 and the form rollers by 8. i

The impression cylinder 4, the circumference of which is substantially one-half the stroke of the bed isgeared at'all times to the form bed 2 through the rack 9 and gear 10, the cylinder being raised out'of contact with the form 3 on the return or non-printing stroke of the bed by the usual mechanism denoted by 11.

The sheet feed table of any well known or approved form is denoted by 12 and its feed guide by 13.

The sheet delivery mechanism may be of any well known or approved form and it is herein shown as comprising a delivery table 14, a reciprocating sheet coveying means 15 and the guides'16,17 for directing the printed sheets from the impression cylinderto the reciprocating conveying means.

The motive fluid means for reciprocating the form bed is denoted generally by 18 and will not be specifically described herein as it forms the subject matter of my copending application hereinbefore referred to.

The several devices for controlling the passage of the sheet to and from the impression cylinder will be described generally but not in detail as they may be of any well known .or approved construction.

' In the present instance the bed is provided on one side thereof with a feed guide operating cam 19 arranged in position to engage the stud or roller 20 on the lower end of the bar 21, the upper'end of which is connected to the rock lever 22 which controls the operation of the feed guide 13 to release the sheet as the cylinder is about to start on its first revolution.

On the same side of the form bed and adj acent to the feed guide operating cam 19 there is located the cam 23 which is arranged in position to engage a stud or roller 24 carried by the lateral sliding pin 25 connected to the lever 26 which controls the movement of the tumbler cam pin 27 to bring it into and out of engagement with the gripper tumbler cam 28 for operating the grippers 5 at the proper time to receive and grasp the head end of the sheet fed from the feed table as the impression cylinder is about to start on its first revo lution.

T o m b d i al o pro ide o its pp e sid w t a g ipper release cam 29 a ranged to engage a stud or roller 30 carried y a. red 31 c nnected to one a m .32 of a rock lever, the other arm 33 of which is provided with a cam 34 arranged in position to engage a stud or roller 35 of an arm 36 carried by the impression cylinder gripper shaft, This cam is so located that the impression cylinder grippers 5 will be released as the impression cylinder starts on its second revolution, for permitting the transfer of the head end of the sheet to the delivery-mechanism.

To ensure the transfer of the head end of the sheet to the guides 16, 17, of the delivery mechanism I also provide the form bed with a stripping finger operating cam 37 arranged in position to engage a stud or roller 38 on a rod 39 connected to a lever 40 carrying a cam 41 arranged to be brought into engagement with a stud or roller 42 carried by an arm 43 of the stripper shaft 44 so as to raise the stripper fingers 45 at the proper time to direct the head end of the sheet between the said guides 16, 17.

To ensure the positive feed of the sheet from the impression cylinder to the delivery mechanism I provide ooacting rollers 46, 47 adjacent the guides 16, 17 and I also provide rollers 48 arranged to be brought into engagement with the sheet Whilepn the impression cylinder, said rollers 48 being carried by one arm 49 of a rock lever the other arm 50 of which is connected by a rod 51 to one arm 52 of another rock lever, said last named rock lever having an arm 53 carrying a stud or roller 5% arranged to be en aged by a cam '55 carried by a gear 56 whic i meshes with a gear 57 fast on the impression cylinder shaft 58, exterior to the frame 1.

It will be seen, from the above description that I have provided a four revolution bed and cylinder one color printing press in which a relatively small impression cylinder may be employed, thereby materially reducing the weight and expense of the press and else bringing the feed and delivery mechanisms down into a more accessible position for the operator.

It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention, hence I do not intend to be limited to the particular embodiment herein shown and described, but what I claim is 2* 1. In a bed and cylinder printing press, a reciprocating bed and an impression cylinder, said cylinder being arranged to make two revolutions in one direction'during the printing stroke of the bed and two revolutions in the opposite direction during the non-printing stroke of the bed.

2. In a bed and cylinder printing press, a delivery mechanism, a reciprocating bed and n imp ion cy der, said cylinder eing arra g d to make two re olutions in one di= rection duri g the printing stroke of the bed and two re olutions in the opposite d rection during the nonvprinting stroke of the bed, the sheet being taken, printed and transferred to the delivery mechanism during the first two revolutions of the cylinder.

3- In a bed and cylinder printin press, a delivery mechanism including a elivery table and means for conveying the printed sheets ther to rom the impression cylinder, a reciprocating bed and an impression cylinder, said cylinder being arranged during the printing stroke of the bed to make two new olutions in one direction for taking, print ing and transferring the sheet to the convey in means Of the delivery mechanism and to make two revolutions in the opposite di rection during the non-printing stroke of the bed while the sheet conveying means is arrying the printed sheet to and depositing it on the delivery table.

4. In a bed and cylinder printing press, a delivery mechanism, a reciprocating bed, an impression cylinder arranged to make two revolutions in one direction durin the printing stroke of the bed and two revolution in the opposite direction during the nonprinting stroke of the bed, the sheet being taken, printed and transferred to the delivery mechanism during the first two revolutions of the cylinder, and mechanism operable to release the leading end of the sheet before the second revolution of the cylinder to permit the transfer of the sheet from the cylinder to the delivery mechanism while the sheet is still being printed.

5. In a bed and cylinder printing press, a reciprocating bed and an impression cylinder, the circumference of the impression, cylinder being substantially one-Half the stroke of the bed.

(Lin a bed and cylinder printing a reciprocating bed and an impremjioii cylin der eared at all times thereto, the circumference of the impression c linder being substantially one-half the stro e of the 7. In a bed and cylinder printing press, a reciprocating bed and an impression cylinder, said cylinder being arranged to make two revolutions in one direction during the printing stroke of the bed and two revolutions in the opposite direction during the non-printing stroke of the bed, grippers on the cylinder and cams positioned on the bed for operating the grippers to cause them to receive and grasp the sheet as the cylinder starts its first revolution and to release the sheet as the cylinder finishes its first revolution.

8. In a bed and cylinder printing press, a delivery mechanism, a reciprocating bed and an impression cylinder, said cylinder being arranged to make two revolutions in one direction during the printing stroke of the bed and two revolutions in the opposite direction during the non-printing stroke of the bed, the sheet being taken, printed and transferred to the delivery mechanism during the first two revolutions of the cylinder, grippers on the cylinder and cams positioned on the bed for operating the grippers to cause them to receive and grasp the sheet as the cylinder starts its first revolution and to release the sheet as the cylinder finishes its first revolution.

In testimony, that I claim the foregoing as my invention, I have signed my name this first day of June, A. D. 1928.

CALVERT B. COTTRELL, 3RD.

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