777e Iloe Double 'Stereotype Perfecting Press has eight stereotype plates on each of the two form cylinders ; four plates, lengthwise each cylinder, and two round the circumference.
This machine has twice the capacity of the Hoe single stereotype press above referred to and in addition can print six or twelve-page papers at the same speed and in a similar manner to the three-page-wide machine by using a three-page-wide roll of paper. Its total capacity is *000 four-page papers per hour, 24,000 six or eight-page papers per hour, 12,000 twelve or sixteen-page papers per hour.
The Hoe Supplement Presses are composed of a regular double press, with a single three page-wide or second double press at right angles to it, and a folder receiving the product of both. Either presican be run at partial (as well as full) capacity, by means of narrow paper rolls, and its product associated with that df the other machine, or they can be disconnected and run separately.
The floe Double Supplement Press.—The main press is similar to the double press already described (which see) and has the same capacity, viz. : 24,000 four, six, or eight-page papers, or 12,000 twelve or sixteen-page papers per hour. The supplement press is similar in capacity to the single press already described. It has a capacity of 24,000 four-page or 12,000 eight page papers.
Each press has its roll of paper, and upon the main press roll of all these supplement presses runs the Hoe automatic tension brake for graduating the feed of the paper to the exact speed of the machine, producing a constant and uniform tension. Total capacity of this machine, 24,000 eight, ten, or twelve-page papers per hour ; 12,000 sixteen or twenty four-page papers per hour.
The Hoe Three-page-wide Supplement Press.—The main press is similar to the double press. The supplement press is of the capacity of the three-page-wide machine, each press being equipped with rolls of paper of suitable width. Total capacity: 26,000 eight-page papers per hour; 24,000 ten, twelve, or fourteen-page papers per hour; 12,000 sixteen, twenty, and twenty-four and twenty-eight-page papers.
The floe Quadruple Press (Fig. S).—Main press and supplement press of the same ca pacity, each being equal to a double press machine. Two rolls of papers used, and total capacity, 48,000 four, six, or eight-page papers per hour; 24,000 ten, twelve, fourteen, or sixteen-page papers; 12,000 twenty, twenty-four, twenty-eight or thirty-two-page papers per hour, all carefully folded together, and pasted, if desired. All of the folders of these newspaper machines are arranged to automatically count their product in lots of twenty five or fifty, in convenient shape for handling.
The Hoe Sextuple Press (see full-page plate).—This is a gigantic machine, probably the
largest in the world, and unapproached in number of combinations or speed of delivery-. Its capacity is estimated at 96,000 four or six-page papers, 72,000 eight-page papers, 48,000 ten or twelve, 36,000 sixteen, 24,000 fourteen, twenty, and twenty-four. This machine, when running at full capacity, prints from three rolls of paper, each about 70 in. wide, and the perfected web is received into a double folder. Besides the great variety of pages possible in the Hoe machinery, all their foregoingpresses are so arranged that the pages may be increased or diminished by one or more columns.
Such is the perfection to which the accessory machinery has been brought (for producing the curved stereotype plates for use upon these machines) that a plate can be completed iu about seven minutes from the time the stercotypers receive the page set up in type, and addi tional and duplicate plates may be cast at the rate of one per minute thereafter. Mechan ism is also supplied whereby the insetting of supplemental or additional pages can be readily accomplished at will, thus conforming to the exigencies of modern newspaper requirements.
Delivery Mechanism, or Folders.—In applying the principle of rotary printing, the chief difficulty has been found in the designing of devices which would successfully handle the stream of papers issuing from the printing cylinders, and with some makers this is yet prac tically an unsolved problem. The folders were either so complicated and delicate as to be constantly getting out of order or meeting injury from " chokes " of paper, or were so inac curate when driven at high speed as to be useless. Until very recently the folders were filled with striking blades for striking the paper in a center margin and forcing it downward into the bite of rollers beneath them, thus producing a fold, Large numbers of tapes were used to guide the papers through the various pathways, which introduced another element of uncertainty, for the least atmospheric change would affect their tension. Messrs. lloe & Co. have conceived and carried into execution the idea of giving every portion of the folders a rotary movement, driving by a positive motion in due relation with the printing mechanism, so that every revolution of the printing cylinders would actuate the folders in accurate time with them. So perfect are the results they have obtained that in place of the former neces sity for having several folding mechanisms of huge dimensions to handle the product of one set of printing cylinders, in the machines of their manufacture one small folding device receives the total output of two or more complete presses.