US1287524A - Offset-web cleaner for printing-presses. - Google Patents

Offset-web cleaner for printing-presses. Download PDF

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Publication number
US1287524A
US1287524A US14705417A US14705417A US1287524A US 1287524 A US1287524 A US 1287524A US 14705417 A US14705417 A US 14705417A US 14705417 A US14705417 A US 14705417A US 1287524 A US1287524 A US 1287524A
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Prior art keywords
web
offset
blades
cleaner
printing
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US14705417A
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James M Trier
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F23/00Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/06Powdering devices, e.g. for preventing set-off

Definitions

  • JAMES M. warns, on NEW YORK, n. Y.
  • Figure 1 is a longitudinal vertical section showing diagrammatically, the arrangement of printing, packing and Web-winding cylinders and guide rollers connected therewith as embodied in presses of conventional make, together with a cleaner for said web constructed and arranged in accordance with the present invention
  • Fig. 2 is a plan view of said cleaner
  • Fig. 3 is a cross section of the cleaner on an enlarged scale, the section being taken as on the line 33 in Fig. 2;
  • Fig. 4 is a longitudinal section on an enlarged scale, showing a fragment of said cleaner and pivot therefor, the section being taken as on the line 44 in Fig. 2;
  • Fig. 5 is a detail view on an enlarged scale, and in longitudinal section,the section being taken as on the line 55 in Fig. 2;
  • Fig. 6 is a cross section of the same, the
  • an offset web 14 is used... This web covers the surface of the packing roller 13 with which the web 12 is in contact.
  • the web 14 therefore backs or liesin close contact with the web 11, and by moving synchronously therewith, all danger of smudging the wet ink-on that side of the web 11 isavoided. It is obvious that while in contact with the wet sheet or'web 11, a portion of the wet ink is transferred to the offset web 14.
  • the offset web 14 is wound on the drum 15, which is supported on the synchronized driving rollers 16 to be rotated thereby at a pcripheral speed equal to .the travel of the web 11. In this manner is avoided any tendency to pull the offset web 14 in advance of the web 11.
  • the said cleaner has a stationary hanger frame 18.
  • the frame 18 is provided at the opposite ends thereof with hanging straps 19, each of which is furnished with a vertical slot 20, through which bolts for suspending the frame 18 are passed to be secured in the frame of the printing press to which the cleaner is attached.
  • the length of the slots 20 is suffieient to permit vertical adjustment of the ends of the frame 18 to lift the rubbing bars above the plane coincident with the lower edges of the guide rolls 21 of the printing press as shown in Fig. 1 of the drawings.
  • the frame 18 has at the longitudinal center thereof, alined oppositely-disposed saddles 22.
  • the saddles 22 are semi-circular, the center of the curve being coincident with the tops of the rubbing blades 23 whereon rests the under surface of the offset web 1 1.
  • the centers or curved surfaces of the saddles 22 are in service, in the plane with the offset web 14. In this manner, provision is made to avoid shifting the said offset web 1 1 when the blades 23 are rocked.
  • Each of the blades 23 is bent at its center to form a sharp angle.
  • the side extensions of said blades from said angles operate to smooth or spread each side of the web 14 thesame is drawn over the said blades.
  • the blades 23 are mounted on an elongated rectangular frame having side bars 21 and a series of cross bars Centrally disposed and attached to the side bars 2 1 are curved pivot rockers 26.
  • the pins 27 are inserted through the sides of the frame 18 and in service extend above the rockers 26 to prevent lifting said rockers from thesaddles 22.
  • the rocking frame above described is provided with rubbing blades 28 and 29, said blades being bent to a more obtuse angle than the blades 23.
  • the inclination of the lateral sections of said blades is in a similar direction to that of the lateral sections of the blades 23.
  • the rocking frame is normally held level by. springs 30.
  • the springs 30 are guided by the pins 31, which, as shown best in Fig. 3 of the drawings are made fast to the end cross bars of the stationary frame 18.
  • a printing press employing an offset web such as indicated by the numeral 14- is equippedwith cleaner constructed and arranged in accordance with the present invention, the caked or surface-adhering ink or other deposit is removed from the surface of said web before the same brought into contact with the web 11.
  • the blades 23 2S and 29 operate to break the deposit from the surface of the web 14L rather than to scrape the same. This is due to the adhesion of the deposit accumulated at the edge of each of said blades.
  • said means embodying a pivot, the axis whereof approximates the plane of said web.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

J. M. TRIER.
OFfSET WEB CLEANER FOR PRINTING PRESSES. APPLICATION FILED FEB. I, 1911.
1,287,524. Patented Dec. 10, 1918.
Z SHEETSSHEET I.
WITNESSES mum/ 01? c/amas' M 77%? ATTORNEYS J. M. THIER.
OFFSET WEB CLEANER FOR PRINTING PRESSES/ APPLICATION FILED His. 1. um.
13873524., Patented Dec.10, 1918.
2 SHEETSSHEET 2- WITNESSES W INVENTOR fiflW/p i5 3 Mamas/147M? a ATTORNEYS m: mamas Pzrsns cu. Pnayn-urna. WASMIHGTDN. a r.
JAMES M. warns, on NEW YORK, n. Y.
OFFSETFWEB CLEANER. FOR PRINTING-PRESSES.
Specification of Letters Patent.
Patented Dec. 10, 1918.
Application filed February 7, 1917. Serial No. 147,054.
To all whom it may concern Be it known that 1, JAMES M. TRLER, a citizen of the United States, and a resident of the city of New York, borough of the Bronx, in the county of Bronx and State of New York, have invented a new and Improved Ofi'set-VVeb Cleaner for Printing-Presses, of which the following is a full, clear and exact description.
Among the principal objects which the present invention has in view are: to extend the useful life of an offset web; to prevent the accumulation of smutting or blurring substances on said web; to smooth said Web before introducing the same to the packing roller; to provide apparatus for the accomplishment of the above-stated purposes which are interchangeable and quickly adjustable; and to concentrate the accumulated debris collected from said web.
Drawings.
Figure 1 is a longitudinal vertical section showing diagrammatically, the arrangement of printing, packing and Web-winding cylinders and guide rollers connected therewith as embodied in presses of conventional make, together with a cleaner for said web constructed and arranged in accordance with the present invention;
Fig. 2 is a plan view of said cleaner;
Fig. 3 is a cross section of the cleaner on an enlarged scale, the section being taken as on the line 33 in Fig. 2;
Fig. 4 is a longitudinal section on an enlarged scale, showing a fragment of said cleaner and pivot therefor, the section being taken as on the line 44 in Fig. 2;
Fig. 5 is a detail view on an enlarged scale, and in longitudinal section,the section being taken as on the line 55 in Fig. 2;
Fig. 6 is a cross section of the same, the
section being taken as on the line 66 in Fig. 2.
Description.
The usual practice in most of the improved presses is to print both sides of the web in a singlepassage through the press.
To accomplish this the web 11 indicated in 12 is, of course, the side turned away from the said roller. I
To prevent the transfer of the wet ink of the previously printing operation to the packing roller 13, an offset web 14 is used... This web covers the surface of the packing roller 13 with which the web 12 is in contact. The web 14 therefore backs or liesin close contact with the web 11, and by moving synchronously therewith, all danger of smudging the wet ink-on that side of the web 11 isavoided. It is obvious that while in contact with the wet sheet or'web 11, a portion of the wet ink is transferred to the offset web 14.
The offset web 14 is wound on the drum 15, which is supported on the synchronized driving rollers 16 to be rotated thereby at a pcripheral speed equal to .the travel of the web 11. In this manner is avoided any tendency to pull the offset web 14 in advance of the web 11.
It is obvious that the ink deposit on the offset web 14 is held between the convolutions thereof when the same is rolled on the drum 15. When in accordance with the usual custom the drums 15 and 17 are reversed and the web 14 is fed in the reverse direction from that indicatedin Fig. 1 of webis transferred to the web 11 when passing between the rollers 12 and .13. To overcome this objection is the principal object of the present invention, and to this end is employed the cleaner shown best in Fig. 2 of the drawings.
The said cleaner has a stationary hanger frame 18. The frame 18 is provided at the opposite ends thereof with hanging straps 19, each of which is furnished with a vertical slot 20, through which bolts for suspending the frame 18 are passed to be secured in the frame of the printing press to which the cleaner is attached. The length of the slots 20 is suffieient to permit vertical adjustment of the ends of the frame 18 to lift the rubbing bars above the plane coincident with the lower edges of the guide rolls 21 of the printing press as shown in Fig. 1 of the drawings.
The frame 18 has at the longitudinal center thereof, alined oppositely-disposed saddles 22. The saddles 22 are semi-circular, the center of the curve being coincident with the tops of the rubbing blades 23 whereon rests the under surface of the offset web 1 1. In other words the centers or curved surfaces of the saddles 22 are in service, in the plane with the offset web 14. In this manner, provision is made to avoid shifting the said offset web 1 1 when the blades 23 are rocked.
Each of the blades 23 is bent at its center to form a sharp angle. The side extensions of said blades from said angles operate to smooth or spread each side of the web 14 thesame is drawn over the said blades.
The blades 23 are mounted on an elongated rectangular frame having side bars 21 and a series of cross bars Centrally disposed and attached to the side bars 2 1 are curved pivot rockers 26. The curva ture of the rockers 26 as shown best in Fig. 1 of the drawings, corresponds with the curved seats of the saddles 22. For this reason when the frame carrying th blades 23 is locked on its center, the movement is coincident with the plane of the web 141 resting on said blades. The pins 27 are inserted through the sides of the frame 18 and in service extend above the rockers 26 to prevent lifting said rockers from thesaddles 22.
The rocking frame above described is provided with rubbing blades 28 and 29, said blades being bent to a more obtuse angle than the blades 23. The inclination of the lateral sections of said blades is in a similar direction to that of the lateral sections of the blades 23. The rocking frame is normally held level by. springs 30. The springs 30 are guided by the pins 31, which, as shown best in Fig. 3 of the drawings are made fast to the end cross bars of the stationary frame 18.
By placing the frame 18 so that the web 1% is elevated slightly above the lower level of the guide rolls 21, a gentle tension is eX- erted on the web 1% by the blades 23, 28 and 29.' The pressure of the web 14: on the said blades provides a frictional contact of the web so that the same is brought within the influence of the angularly-disposed sections of the blades, which tends to lead the web in the direction of the inclination. Both sections being inclined from the center of the web the result is that the web is slightly drawn or spread from its center.
hen a printing press employing an offset web such as indicated by the numeral 14-, is equippedwith cleaner constructed and arranged in accordance with the present invention, the caked or surface-adhering ink or other deposit is removed from the surface of said web before the same brought into contact with the web 11. The blades 23 2S and 29 operate to break the deposit from the surface of the web 14L rather than to scrape the same. This is due to the adhesion of the deposit accumulated at the edge of each of said blades.
It is obvious that the web 1% is liable to become stretched or contracted in sections adjacent either of the lateral edges thereof. The slackness or tightness of the web resulting from this is accommodated by the rock of the frame and the blades '23, 28 and 29 mounted thereon.
It is obvious that by moving a cleaner such as described, the service life of an offset web is augmented and smudging or defacing the web being printed is avoided.
Claims.
1. The combination of a printing press and an offset web therefor; a cleaner for said web embodying rigid rubbing members disposed transverse said web in supporting relation thereto; means for keeping said web in contact with said rubbin members; and means for pivoting said members for rocking in correspondence with the pressure on said web, said means embodying a pivot, the axis whereof is in a plane coincident with said web.
2. The coi'nbination of a printing press and an offset .web therefor; a cleaner for said web embodying rigid rubbing members disposed transverse said web in supporting relation thereto; means for keeping said web in contact with said rubbing members; and
means for pivoting said members for rock.
ing in correspondence with the pressure on said web, said means embodying a pivot, the axis whereof approximates the plane of said web.
The combination of a printing press and an offset web therefor; a cleaner for said web embodying rigid rubbing members disposed transverse said web in'supporting' re lation thereto; means for keeping said web in contact with said rubbing members; and means for pivoting said members for rocking in correspondence with the pressure on said web, said means embodying a pivot, the axis whereof is in a plane coincident with find adjacent the upper edge of said meniers.
JAMES M. TRIER.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.
US14705417A 1917-02-07 1917-02-07 Offset-web cleaner for printing-presses. Expired - Lifetime US1287524A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168812A (en) * 1991-05-24 1992-12-08 Komori Corporation Ink cleaning apparatus for rotary printing press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168812A (en) * 1991-05-24 1992-12-08 Komori Corporation Ink cleaning apparatus for rotary printing press

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