US1934775A

US1934775A - Method of web printing

Info

Publication number: US1934775A
Application number: US449309A
Authority: US
Inventors: Stoessel Max
Original assignee: SHELLMAR PRODUCTS CO
Current assignee: SHELLMAR PRODUCTS Co
Priority date: 1930-05-02
Filing date: 1930-05-02
Publication date: 1933-11-14
Anticipated expiration: 1950-11-14

Description

No'v.14;1933. M; EL' 1,934,775

METHOD OF WEB PRINTING Original Filed May 2, 1950 s g g\ a N q C; R E g INVENTOR.

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Patented 44, 1933 PATENT orFmE METHOD OF WEB PRINTING Max Stoessel, Ridgewood, -N. 1., assignor, by mesne assignments, to Shellmar'Products- Company, Chicago, 111., a corporation of Delaware Application May 2, 1930, Serial No. 449,309

Renewed July 24, 1933- 5 Claims. (01. 101-211) This invention relates to an improved method a for use in the printing of webs, or continuous lengths of material.

In particular an object of my invention is to 5 print transparent material, like cellophane, now in use to wrap a great variety of merchandise. This material as ordinarily used is very thin and not adapted to be handled in sheets over sheet fed printing presses.

A specific object of my invention is to provide a method of producing an overlay during the printing of the material, and at the same time avoid the difficulties which are customary in attempting this type of work.

As an example of a use to which my invention can be'applied I cite the cellophane wrapper used in wrapping cigars. The ordinary practice is to use unprinted wrappers, and to use the customary cigar band. By the use of my invention it becomes possible and commercially practical to print on the cellophane wrapper an exact replica of a cigar band and thus save not only a large portion of the cost of these bands but the expense of applying the "bands to the cigars. It

might be well to point out here that these'bands are applied by hand and some of the large manufacturers of cigars produce over one million cigars daily.

My improved method comprises the initial printing with an ink, lacquer, or equivalent substance of a visible design called a primary design and immediately thereafter printing directly on top of said visible primary design one or more additional visible designs, usually in d1!- 85 ferent colors. The vehicle or solvent used in compounding the ink forming the primary design is of such a nature that -it will not mix with the vehicle or solvent used in the inks forming the subsequent designs. a

40 The following description of an apparatus adapted to carry out my improved method is included in this specification only as an example of a device having the necessary functions. It will be understood that I am not limited to the described apparatus but my invention can be carried out with other apparatus having equivalent functions.

In the drawing Fig. 1 represents a general view of the. apparatus used to carry out my improved Referring to Fig. 1, like reference numerals rep-' resent like parts. Reference numeral 4is the web of material being printed on. 5 is the frame of the machine. A supply roll 6 of material to be printed is supported at one end of the machine.

Mounted on the frame 5 is the printing assembly 7 preferably of the gravure type and comprises a plate cylinder 8 and an impression cylinder 9. Contacting with the plate cylinder 8 is thecoating roll 10 operating in the fountain 11. The scraper l2 removes the surplus ink or lacquer from the gravure plate.

Mounted on the frame 5 are the printing assemblies 13, 14 and 15. Each of these assemblies comprise a plate cylinder 16, an impression cylinder 17, an ink fountain 18 and the usual complement of oscillating, vibrating and distributing rolls necessary to ink the printing plates.

Mounted on the frame 5 is the slitting assembly 19 for use if it is desired to slit the web 4 into narrower strips, such as are required for cigar wrapping machines. A series of feedrolls 20 are I provided to maintain the proper tension on the web. The

rollers

21, 22, 23 and "24 are used to permit looping of the web and drying of the inks before winding on the roll 25.

A blower 26 is provided to assist in cooling and I drying the ink forming the primary design.

Suitable gearing is provided to operate the machine but since the details of this mechanism are not pertinent to the invention described and claimed in this application, I have neither enumerated nordescribed same in this specification.

The novel features of the apparatus shown are more fully described in my co-pending application, Serial No. 449,310.

The operation is as follows The web of material to be printed is taken from the supply roll 6, passes around suitable guide rollers and over the impression cylinder 8 of the gravure printing assembly. At this point the primary design is applied and I prefer to use a lacquer which uses an alcohol as a fluid medium. If it is desired to print a replica of a cigar band on the material the primary design which is applied by the printing assembly '7 would ordinarily consist of a solid color background, the outline of which will be in the shape of the cigar band. In many cases a solid white background would be used.

Passing from the printing assembly '7 the webis guided through the printing assembly 13 and on through assemblies 14 and 15. Additional colors not miscible with the fluid medium'used in the first printing assembly and consequently'there would be no running or blending of the inks.

The printing assemblies making use of the same type of ink, in diilerent colors, would be equipped with registering plates, to avoid mixture of colors.

It is quite possible, though seldom necessary or desirable, -to use more than two types of inks in printing one complete design. Thus, a water soluble gravure ink might be used for the primary design in assembly 10, an alcohol-soluble lacquer be used in assembly 16 and inks with an oil vehicle in assemblies 17 and 18.

It might be well to point out that one outstanding advantage of my improved method is the fine result obtained when printing on transparent material, such as cellophane. The primary design in this case serves as a background, and it printed with opaque ink causes the additional printing to stand out and be far more legible.

In Fig. 2, there is illustrated diagrammatically I a sheet or web upon which primary and secondary designs are printed in, accordance with my method. Self-explanatory legends designate the I claim:' 1. The method of printing on a desired surfac which comprises printing a visible primary denamed medium. K

uous web passing through a machine, which comprises printing a visible primary design on said web with one type of ink having a certain fluid medium during the passage of the web through one printing assembly, and immediately thereafter visibly printing directly on said visible primary design with a different type of ink having a diil'ere'nt fluid medium not miscible with the first named medium during the passage 01' the web through a second printing assembly.

3. The method of printing on a moving continuous web, which comprises printing a visible primary design with an ink compounded with one type of fluid-medium, and immediately thereafter printing a second visible design directly on said primary design with an ink compounded with a different type of fluid-medium not miscible with the fluid-medium used in printing the pri mary design.

e. The method of printing which comprises the printing of a visible primary design with a primary fluid-medium, and immediately thereafter superimposing a visible design on said primary design by the use of a diilerent fluid-medium which will not mix with said primary fiuid-medium.

5. The method of printing on material, such as cellophane, having a glossy surface, which comprises printing a visible primary design with a fluid-medium, and printing avisible design on said primary design with a difierent fluid-medium not miscible with said first fluid-medium.

mix STOESSEL.

2. The method of printing on a moving contin-g.