US1470345A

US1470345A - Means for and method of applying antioffset material to freshlyprinted sheets

Info

Publication number: US1470345A
Application number: US537835A
Authority: US
Inventors: Howard M Barber
Original assignee: Individual
Current assignee: CB Cottrell and Sons Co
Priority date: 1922-02-20
Filing date: 1922-02-20
Publication date: 1923-10-09
Anticipated expiration: 1940-10-09

Description

@ch 9 11923. 11AW345 H M. BARBER MEANS FOR AND METHOD OF APPLYING ANTIQFFSET MATERIAL T0 FRESHLY PRINTED SHEETS w Filed Feb. 20. 1922 2 Sheets-Shee't 1 IN VEN TOR Bl A TTORNE Y6 @ch 9 R$2E ii mfififi H. M. BARER MEANS FOR AND METHOD OF APPLYING ANTIOFFSET MATERIAL- TO FRESHLY PRINTED SHEETS Filed Feb. 20. 1922 =5 :5 E E E: .5 E5 :5

INVENTOR fl /M Wt, 759% B2 A TTORNE 149 Patented Get. 33, 19235.

HOWARD .llll'. BARBER, F STONINGTON, CONNECTICUT, ASSIGNOR T0 C. B. COTTRELL dz SON S OOMIPANY, OF NEW Y0, N. Y., A CORPORATION OF DELAWARE.

MEANS FOR AND METHOD BF APPLYING ANTIOFFSET MATERIAL T0 FEESEILY- PRINTED SHEETS.

Application filed Eeluuary 20, 1922. Serial No. 537,835.

To all whom it may concern:

Be it known that'l, Howard) M. BARBER,

a citizen of the United States, and resident of Stonington, in the county of New Leudon and State of Connecticut, have invented a new and useful Improvement in Means for and Methods of Applying Antioifset Material to Freshly-Printed Sheets, of which the following a specification.

In the printing art it frequently happens that only a portion or portions of a freshly printed sheet requires the use of an antioffsetting medium, as for instance where only a portion or portions of the sheet are "M3 printed or where only a portion or portions of the sheet are heavily printed and the balance of the sheet lightly printed. Slip sheets must be substantially the size of the printed sheets and the slip sheets are not only expensive but require complicated machinery for properly introducing them between and separating them from the printed sheets. Where anti-offset material has been used heretofore. it has been a plied to the 2 entire sheet and not only resu tsin a considerable expense, but also requires the use of complicated apparatus for removing the surplus material from the sheets.

The object of my invention therefore is to provide a novel means for and method of treating freshly printed sheets especially color sheets, by applying an anti-offset material in liquid or powder form onto the back of the freshly printed sheet opposite a predetermined portion or portions thereof, to prevent offset from the next adjacent sheet in the pile after delivery.

My invention includes means whereby the backs of the freshly printed sheets opposite so heavily printed portions thereof are treated with antioifset material, leaving the portions opposite the lightly printed or unprinted portions of the sheet untreated.

My invention more particularly includes as providing a member with one or more relief portions corres ending in outline to and adapted to reglster with a predetermined heavily printed portion or ortions of the freshly printed sheet, means ing employed so for applying the anti-ofiset material in liquid or powder form to said relief portion or ortions for transfer thereb onto the bee of the sheet opposite sai predetermined heavily printed portion or portions.

mined heavily printed A practical embodiment of my invention is represented in the accompanying drawings, in which the invention 1s shown as applied to a multi-c-olor rotary sheet printin press.

*ig. 1 represents a longitudinal vertical central section through a portion of a multicolor printing press with my anti-ofi'set material applying mechanism-shown in connection therewith.

'Fig. 2 represents an exaggerated detail section of the anti-offset material applying 6 and 7 with their respective sheet carrying head grippers 8 and 9. The sheet feed cylinder 10 is provided with a set of head,

grippers 11 for feeding the sheets from any suitable source of supply to the impression cylinder. The printed sheet delivery reel 12 may be provided with a set of head grippers 13 for taking the freshly printed sheets from the impression cylinder and deliverinw them to any suitable point.

The means which I have shown for a lying anti-ofi'set material either in liquid or powder form to the back of the freshly printed sheet opposite a predetermined portion or portions thereof, is herein shown as a rotary cylinder 14, having one or more relief portions corresponding in outline to and in registry with predetermined heavily printed portion or portions of the freshly printed sheet, said cylinder 14 bein arranged to apply the anti-ofiset materia onto the back of the sheet opposite the predeterortion or portions thereof while the fresh y printed sheet is being delivered. Friction pulle s 15 are placed opposite the longitudina margins of the sheet for the purpose of holding the sheet against the cylinder 14: with a pressure sufiicient to cause the anti-od'set mate. rial to transfer from the relief portion or portions of the cylinder 14: on the baclr of the sheet. i

One way of providing the cylinder 1a with till a relief portion or portions would be to wrap the proof 16 around the cylinder 14 in proper register with respect to the freshly printed sheet and then build up the required portions of the proof to form reliefs, such as 17 voir to the

relief portions

17,18, on the cylinder 14 for transfer thereby onto the back of the freshly printed sheet opposite the heavily printed portions thereof as the sheet passes from the delivery reel 12. The roll 21 is carried inadjustabIe bearings 22 so that it may be set in proper adjustment to both the roll 20 and the relief form carried by the cylinder 14. It may be desirable to use a blade 23 for regulating the supply of the anti-offset material from the roll 20 to the roll 21.

From the above description it will be seen that by the use. of my invention I am enabled to apply anti-offset material in liquid or powder form to the back of the freshly printed sheet opposite that portion; or portions onl which require treatment to prevent offset rom the next adjacent sheet in the pile. This arrangement results in a considerable saving of the anti-offset material which is of-great importance and also eliminates thene'cessity of utilizing complicated and expensive machinery for removing excess anti-ofi'set material from the freshly printed sheet.

This invention is particularly well adapted for use in connection with color work Where certain portions of the sheet are provided with much heavier application of the color than other portions thereof, the back of the sheet opposite said heavier portions re uiring treatment for preventing ofi'set. t is evident that various changes may be made in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention, hence, I do not wish to limit myself to the articular embodiment herein shown and escribed, but

What I claim is:- 1. Sheet printing and delivery mechanisms, and means coacting with the delivery printed portion anti-offset mateoffset material onto said relief portion for transfer thereby onto the back of the sheet.

4. Sheet printing and delivery mechanisms, a cylinder coacting with the delivery mechanism and having a proof applied thereto in registry with the printed sheet, said proof having a relief portion corresponding 1n outline to that portion of the sheet to which the anti-offset material'is to be applied, and means for applying the anti-offset material onto said relief portion for transfer thereby onto the back of the sheet.

5. The method of preventing offset from a freshly printed sheet onto the next adjacent sheet of a pile consisting in applying anti-offset material onto the back of the freshly printed sheet opposite a predetermined printed portion thereof.

6. The method of preventing offset from a freshly cent sheet of apile consisting in applying anti-offset material onto the back of the freshly printed sheet opposite a predetermined heavily printed portion thereof.

printed sheet onto the next adja- 7. The method of preventing ofi'setfrom a freshly printed sheet onto the next adjacent sheet of a pile consisting in produc1ng a member havin a relief portlon corresponding to and in registry with a predetermined portion of the sheet, applying anti-offset material to said relief portion, and transferring the anti-offset material from said relief portion onto the back of the freshly printed sheet opposite the portion that corresponds to the said relief portion.

In testimony that I claim the foregoing as my invention, I have sigged my name this 17th day of February, A. 1922.

HOWARD M. BAR-BER.