US2218282A

US2218282A - Apparatus for printing

Info

Publication number: US2218282A
Application number: US205914A
Authority: US
Inventors: John M Downs
Original assignee: CURTIS PUBLISHING CO
Current assignee: CURTIS PUBLISHING CO
Priority date: 1938-05-04
Filing date: 1938-05-04
Publication date: 1940-10-15
Anticipated expiration: 1957-10-15

Description

Oct 15. 1940-. J, M. DowNs 2,218,282

APPARATUS FOR PRINTING Filed May 4, 1938 v 6 Sheets-Sheet l //VVEA/70/?' HY W ra 7 xrram/gx J. M. DOWNS APPARATUS FOR PRINTING Oct. 15, 1940.

Filed May 4, 1938 e Sheets-Sheet 2 Oct. 15, 1940.

DOWNS APPARATUS FOR PRINTING Filed May 4, 1938 6 Sheets-Sheet 3 Away/v (20/ 222 )L fiaz'an: I: a

Oct. 15. 1940. J M. DOWNS 1 APPARATUS FOR PRINTING Filed May 4, 1938 6 Sheets-Sheet 4 Oct. 15. 1940. J M: DOWNS APPARATUS FOR PRINTING Filed May 4, 1938 6 Sheets-Sheet 6 lv/rA/sss; 61

' Arm/M457 0ct.15. 1940. JAMADOWNS 2,218,282

APPARATUS FOR PRINTING Filed May 4, 1938 6 Sheets-Sheet 6 (Z9752: flg ozwzs 153W Patented Oct. 15, 1940. l

UNITED STATES PATENT OFFICE APPARATUS roa PRINTING John M. Downs, Philadelphia la assignor to The Curtis Publishing Company, Philadelphia, Pa., a. corporation of Pennsylvania Application May 4, 1938, Serial No. 205,914

7 Claims.

In multicolor printing and for the purposes of drying the ink to the end that production may be speeded up use is frequently made of hoods of cent space. The present invention also provides an apparatus adapted for the practice of the 15 method described in copending application, Serial Number 205,915 filed May 4, 1938, by me in connection with such a movable hood.

Generally stated the invention comprises first and second side printing mechanisms arranged in 20 series and thru which a web rapidly travels, an internally heated drum arranged at the delivery side of each of said mechanisms and to and over which the web travels with the newly printed side out anddirectly from the printing mechanism, an arcuate hood tightly enclosing a chamber around a substantial portion of the periphery of each drum and having closely spaced inlet and outlet ports, and a recirculating system connected with said ports and including a heater and burner and 30 a blower.

The invention also comprises the improvements to be presently described and finally claimed.

In the following description reference will be made to the accompanying drawings forming part hereof and in which- Figure 1 is a side elevational view with parts broken away of one of the printing mechanisms and of which the other printing mechanism is a substantial duplicate.

Fig. 1A is a sectional view taken on the line |A-lAof Fig. 3. t

Fig. 2 is an elevational view showing mechanism for moving the hoods.

Fig. 3 is a top or plan view showing the re.- circulating system for the hoods of the two printing mechanisms, indicating that the inlet and outlet fines may be designed for use with movable hoods.

50 Figs. 4 and 5 are respectively a sectional elevation and a sectional planshowing parts of the recirculating system and parts of the movable hoods.

Fig. 6 is an elevational view showing one of the 5 hoods in retracted position to mom access to the heating roll for recovering and repairing a broken web, and

Fig. 7 is an enlarged transverse sectional view of inlet and outlet ports to the hood.

Referring to the drawings and more particu- 5 larly to Fig. 1, I indicates a four color printing mechanism thru which the web W rapidly travels and is printed on one side. 2 indicates an internally heated drum around which the web W passes and by which it is heated so that the heat may be 10 transferred thru the web to the printed face or side. While a four color press is shown, the invention is applicable to presses of more than four colors. From the roll 2 the web W is led over the cooling rolls A and then as by a guide roll IE to a duplicate four color printing press equipped in the manner shown in the drawings and hereinafter described in connection with the first side printing press. 3 is a generally arcuate hood which encloses a substantial part of the area of the roll 2 and which abuts upon the fixed portion 18 which encloses or encases the rest of the roll 2. The movable portion '3 of the hood is mounted upon a carriage l3 having wheels 20 adapted to run on rails or ways 2|. .In describing one of the 2 hoods it will be remembered that there are two hoods and that they are substantially alike, so that a description of one is sufficient. The hoods are moved at the same time and in synchronism by means of a shaft 22 provided with a hand wheel 23, and with pinions 24 that mesh with racks 25 on the carriages. In this way thecarriages and hoods are moved in alignment by the rotation of the hand wheel 23. Internally the hoods are provided with incoming nozzles 4 and I outgoing nozzles 5. The nozzles are closely spaced over a considerable portion of the periphery of the drum 2. The incoming nozzles 4 are supplied from a casing 6, Fig. 4, which is connected with a flue 9 and the outgoing nozzles 5 are connected at the opposite sides of the hood with the conduits 1.. Referring to Fig. 3'the conduits I of one of the hoods extend separately into the hue I0, whereas the conduits 1 of the other machine meet as a branch of an extension of the conduits I which connect with the flue Hi. It will be understood that the described air connections are mounted on and movable with the carriages upon which the hoods are mounted. By reference to Fig. 1, it will be obesrved that the flue l0 extends downward and communicates with a heater and burner H, and thence to a blower or fan 8 which connects with the iiue 9. air inlet.

11 indicates an I4 are flange fittings detachably bolted or otherwise connected together and they are secured respectively to the portions of the conduits 9 and I0 which are fixed and they are indicated at the right in Fig. 2, and to the portions of the conduits Send I which are carried by the carriages [3, .so that when it is desired to move the hoods 3 back and away from. the rolls 2 in the manner described the flanges ll are uncoupled, and, of course, when the hoods 3 are in position to close the chambers in which the rolls 2 are arranged the flanges H are coupled together. The fixed portion I8 of the enclosure of the chamher in which is arranged the roll 2 is shown as provided with an open vent I9.

In use, after the first side four color printing, the web W rapidly travels around the drum 2 and from it, after cooling, over the guide roll 15 to the second printing mechanism which is not shown because it is a substantial duplicate of the first side printing and drying mechanism which is shown in Fig. 1. In its travel around the drum 2 the first side ink on the web W is subjected to heat from the drum 2 thru the web itself and the ink is also subjected directly to a multi; plicity of closely spaced inlet jets 4 of high velocity, high temperature air, at the same time the ink itself is subjected to a multiplicity of outgoing jets 5, and the re-circulation of this large quantity of highly heated, high velocity air thru the chamber enclosed by the hood rapidly and thoroughly dries the ink so that after that treatment the ink may be said to be bone dry and after cooling, the second side printing. can be accomplished without smudging, and in the manner described in connection with the first side printing. The temperature of the drum Imay be below that at which the web scorches, for

'example below 400 to 425 F. and the temperature of the air introduced by the jet nozzles 4 may be considerably above that temperature, but the web is not scorched. because the heat is stopped whenever the press is stopped.

It will be obvious to those skilled in the art to which the invention relates that modifications may be made in details of construction and arrangement without departing from the spirit of the invention which is not limited in respect to.

such matters or otherwise than as the prior art and the appended claims-may require.

I claim:

1. Apparatus for rapidly printing and drying at least four colors on each side of a continuously moving web which comprises first and second side printing mechanisms arranged in series and thru which a web rapidly travels, an internally heated drum arranged at the delivery side of each of said mechanisms and to and over which the web travels newly printed side out directly from the printing mechanism, an arcuate hood tightly enclosing a chamber around a substantial portion of the periphery of each drum and having closely spaced and alternating inlet and outlet ports, and a re-circulating system connected with said ports and including a heater and burner and a blower.

2. Apparatus for rapidly printing and drying at least four colors on each side of a continuously moving web which comprises first and second side printing mechanisms arranged in series and thru which a web rapidly travels, an internally heated drum arranged at the delivery side of each of said mechanisms and to and over which the web travels newly printed side out directlyirom the printing mechanism, an arcuate hood tightly enclosing a chamber around a substantial portion of the periphery of each drum and having closely spaced and alternating inlet and outlet ports, a re-ciiculating system connected with said ports and including sectional inlet and outlet fiues ofwhich the sections are detachably connected together and oi! which one section is connected to the hoods, means by which the hoods and their connected flue sections can be moved into spaced relation with respect to the drums and back again to their original positions, and a heater and burner and a blower interposed in the flue.

3. In apparatus of the type described the combination of a high pressure heated roll around which a first side printed web travels, and a hood defining a chamber around said roll and consisting of a fixed portion through the wall of which the web enters and leaves and a detached movable portion adapted to be bodily moved into contact with the fixed portion and into a position entirely spaced from the fixed portion to afiord access to accumulations of paper at the roll.

4. In apparatus of the type described the combination of a high pressure heated roll around which a first side printed web travels, a hood defining a chamber around said roll and consisting of a fixed'portion through the wall of.

which the web enters and leaves and a detached movable portion adapted to be bodily moved into contact with the fixed portion and into a position entirely spaced from the fixed portion to afford access to accumulations of paper at the roll, .and ways upon which said movable portion of the hood is slidable.

5. In printing and drying apparatus the combination of a heated roll around which a first side printed web travels, an arcuate hood which encloses a substantial partoi the area of the roll and which comprises a fixed and a bodily movable portion, said fixed portion provided with openings for the ingress and egress of the web, said movable portion provided with air inlet and outlet connections and a wheeled carriage and its ways on which said movable portion and its air connections are mounted for movement of translation toward and away from the fixed portion.

6. In printing and drying apparatus the combination of a heated roll around which a first side printed web travels, an arcuate hood which encloses a substantial part of the surface of the roll and which comprises a fixed and a bodily movable detached portion, said fixed portion provided with openings for the ingress and. egress of the web, and said movable portion provided with air inlet and outlet connections having laterally opening flanged ends, fixed air connections disposed at an inclination and having flanged ends adapted to cooperate with the first mentioned flanged ends, and means for moving the movable portion of the hood with a motion of translation in respect to the fixed portion of the hood.

7. In a printing and drying apparatus the combination of a heated roll around which a first side printing web travels, an arcuate hood having a bodily movable portion provided with air connections, means upon which the bodily movable portion is movable with a-moti0n of translation, fixed air connections, and coupling members between thefixed and movable air connections.

JOHN M. DOWNS.