We illustrate herewith a very elaboraete special machine designed for color-printing wall-papers. The manufacture of wall-paper has rapidly grown during the past few years, owing to its greatly increased consumption, and both the methods of manufacture and the quality of the products have of late been very much improved.
The special machine here illustrated is made by the Tulpin Brothers, of Rouen, France, who have designed a number of machines to be used in this branch of industry, and which have been extensively introduced in Europe. The machines that have acquired special reputation, are intended for grounding, sizing, color-printing, and satining. We have only space to illustrate and describe their color printing-press, for the use of which we are indebted to out neighbor Der Techniker.
In the operation of color-printing, it is necessary, of course, to have as many engraved patterns as there are colors to be printed. In the press these patterns are engraved upon cylindrical rollers, and the roll of paper to be prnted is passed around a large drum, coming, in the course of its travel, in contact with the revolving rollers, one after the other, each roller being supplied with its own pigment by suitable rollers having endless traveling aprons dipping in troughs containing colors. The machine, as will be observed, has a general resemblance to the presses used in calico-printing. The paper is fed continuously from a large roll, seen at the top of the machine, and being kept sufficiently tant by a simple device, is passed around the large drum. The face of the drum is covered with cloth, and in its passage around it the paper receives, one after the other, the impression from the engraved rollers. The color is fed to each of the deign rollers by means of an endless apron, as seen in the engraving, passing about special rollers, each dipping in a trough of its appropriate color, and driven by suitable gearing. When the paper has passed about the circumference of the drum, it has received the impression of all the rollers, which according to the number of colors required, may be as high as eight or twelve in number. In the machine here shown, there are eight. After the paper has passed the last roller, it is passed on to a drying machine. To produce good work, these machines require to be accurately and substantially constructed, and in these respects the machines of Tulpin Brothers have acquired a well-earned reputation. The frame of the machine here shown is very solid, so that notwithstanding its high speed (3,000 rolls per day), its action is not attended with notable shocks or vibrations. The driving mechanism works smothly, all parts are readily accessible, and the deisgn rollers easily removable.
We may illustrate other machines of this special class in a future issue.
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