Book - Folding iht chines.—The untelline il lustrated by Fig. :l em bodies the latest im provements made by the Chambers Brothers Co., of Philadelphia. It is what may be termed a '• side - registering drop roller machine." Instead of feeding the sheets to register-pins, its in the older style of hook-fold ing machines, the sheet is fed to a side guide and to a drop-roller. The drop roller. running at a high velocity, carries the sheet into the very quickly, and enables the speed of a land-fed machine to be Mei-eased from about 1.000 sheets per hour to from 2,000 to 3,400 per hour. In feed ing, the same guide and nipper-edges are used as in the press-feeder when printing the sheet, and after the sheet enters the folding-muchine, an au tomatic device—working to the same position on the margin as was used when feeding the sheet on the printing-press pulls the sheet into exact position, so that the in tended line of the fold is immediately under the first fold-blade. Thus, if the margins of the printed sheets are uniform—so that when the device is once adjusted to snit any particular distance it is right for all the sheets—then the register obtained in fold ing will be equal to that obtained in Printing. This side guiding, as it is termed, is accom plished automatically within the folding-machine, so that the register is not dependent upon the accuracy with which the operator may feed the sheet. He may fail to place the sheet within of an in. of the intended position, and still the machine will automatic-ally bring it to the required position before the fold is made. This is the main feature that is new in this machine. The machine is so designed that an automatic feeding attachment, known as the Sedgwick feeder, can be connected with the folding-machine, and the combined mechanism work for two or three hours at a time without any attention other than to take away the folded sheets, Such a combination is in successful use. It is built either as a plain folder or folder and pastel.. with or without covering attachment, It is intended for "whole sheets" as printed on the press, so that the same and may be used on the folder as were used in on the press. The sheet is thus folded accurately by the and the is as as that obtained in It has a capacity of 2.000 sheets per hour.
Point fed I?egistering Book-Folders have not been materially altered several years, and any advance made in this type of machine has been confined to minor improvements in construction and detail to suit special demands of publishers.
Combina-tion Folding, Pasting, and Covering Machines are more into use for periodical and pamphlet work. These machines, as their name indicates, perform all the operations of and a pamphlet of 12, 16, 24. 32, or 36 and proauee at each revolution a complete pamphlet, covered, ready to trim, A poster and coverer will do all that a plain will do: to without. either or fold and paste without fold, paste, and cover with color or of paper; or 4 additional may be added to a periodical when an increase of is desired. Machines are also built for on covers of either 4 or 8 an sheet may be added to a periodical—or the number of increased by 4 or 8, as desired, or by an independant sheet of 8 folded and pasted. These machines, when two operators, one for the main sheet and one for the cover. There is also in course of construction a new machine that will not only fold and cover the main sheet with 4 or 8 but will also work an " insert" of either 4 or 8 thus the publisher to issue a paper or of 32, 36, 40, 44, or 48 at will.
Pamphlet-Binding Machine.—fn pamphlets with paper, or other soft covers, a beneficial forward step in the art has been made by the introduction of the & Randall pamphlet-binding machine. This is made up of automatic devices for the paste upon the covers, for the stitched books forward to the covers, for the pasted covers in proper position upon the stitched bodies, and for and the bound pam phlets. In the rear of the machine there is a vertically and intermittently shelf or plat
form, upon which the stitched pamphlets are piled backs inward, and at the upper rear part of the machine proper is situated a which "stabs" or rakes the top pamphlet from the "bank" and deposits it upon one or inure belts, by which it is taken forward. The rear movement of the causes the platform to rise, leaving the next pamphlet in position to be at the proper time. When the pamphlet has been carried forward by the belts to their forward drum, it drops with its back downward upon a horizontal stop-plate upon which it rests momentarily till the stop is withdrawn to the rear by the action of a earn and levers. Then it drops between assisted by vertically belts a which it is forced by a frie tion-roller actuated by levers operated from the cam. The friction-roller has a resilient axis, so as to accommodate thicknesses of pamphlet. The pamphlet has now closely approached the point where the cover is to be applied. The corer is fed into the machine from a table placed at to the pamphlet shelf—i. e., at one side of the machine, and is automatically carried to its position under the pamphlet by means of revolv belts. Previously, however, to its destination it is stopped by a while paste is applied in a line across the center of the cover-blank by a fed from a paste To prevent the paste from before the pamphlet, the tinder side of the central part of the cover-blank is dampened by a roller in water contained in it small As the pamphlet passes between and is forced by the it meets the cover upon the belts with its pasted side uppermost, which is thus, by the advance of the pamphlet, folded over the latter (the paste line the back of the pam phlet), and both are pushed between and by a second pair of compression rolls which complete the and press the two firmly One of each pair of ron,r, has yield so as to provide for different thicknesses of pamphlets. They are driven from the main of the machine, Between the above-mentioned sets of rollers mid parallel therewith, are two extra sets of smaller rollers, one pair to the pamphlet and insure its the pasted cover, and the other set to draw the cover before it the stmerel pair of From the latter the pamphlet falls up m a chute, down which it slides to a press of two jaws, one mov a step supports the, book until the jaws are closed by the action of it cam and lovers. After this press has closet' and the stop a roller of material and. upon at center sweeps and it p the brek (which otherwise would remain to the action of I he rollers), the cover into close con tact at the back, while the press does the same at the shifts of the pamphlet. The roller automat ieally retires, the press opens and the tinishel pamphlet drops upon a fixed plat form, when a follower is pushed forward (toward the rear of the machine), the pam a rest rot:tolled an extensible apron. When the number of hooks exceeds the of the plat form upon which they are meanwhile an attendant removes them in it finished state. 'reSSeS.—Invent ors have considerable attention to their Ajective point to se cow-Amyl, the press that no anniunt of NIT:11• will render the itnpression or irregular. The, principle of he sector has been found well adapted to obtain this desired result, as to ample time to upon the impression. A late type of is fitted with steam-head mill improved stamp-clamps. The bed is adjustable. The impression is given by the use of a plain crank and sectors, a mechanical device by which almost any amount of pressure can be obtained. Any varying motion, with rests or dwells at either end of the stroke, may be made, thus enabling one crank to produce all the desirable movements.