The Practical mechanic's journal . frame of the machine, and are driven by the bevel wheels, e e, whichgear with a large toothed ring on the surface of the table. The inkingrollers, f, are set at a little distance behind each impressing cylinder, D, andare of the ordinary kind. The paper to be printed is shown at G, wherea boy stands to lay the sheets on the form just before it passes beneaththe cylinder, another being posted immediately behind to take off theprinted sheets; thus, for a five-roller machine, ten attendants will berequired. The grippers for securing the paper beneath the cylinde
The Practical mechanic's journal . frame of the machine, and are driven by the bevel wheels, e e, whichgear with a large toothed ring on the surface of the table. The inkingrollers, f, are set at a little distance behind each impressing cylinder, D, andare of the ordinary kind. The paper to be printed is shown at G, wherea boy stands to lay the sheets on the form just before it passes beneaththe cylinder, another being posted immediately behind to take off theprinted sheets; thus, for a five-roller machine, ten attendants will berequired. The grippers for securing the paper beneath the cylinders, are put inaction by a simple la\ er and inclined plane as the table revolves. Each Fig. time the lever comes upon the incline, the gripper is raised against theimpressing cylinder, and carries forward the sheet which the boy pre-sents. The grippers are of considerable length, and moderately flexible,with the intention of being made to act upon the paper for some dis-tance, until it comes to the hand of the attendant. Five cylinders arerepresented in the sketches, but eight or any other number might beadopted. According to my calculations, the five cylinders are capableof giving 3000 or 4000 impressions per hour, printing both sides at thesame time; with eight cylinders it would print 6000. It is to be under-stood that no tapes are required in this machine, and a great mass ofcomplication is thus removed. In book-printing it might be easily ar-ranged for four tables instead of two, to do the same quantity of work. Stephen , Sept. 22, 1848. 184 THE PRACTICAL MECHANICS JOURNAL.
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Keywords: ., bookcentury1800, bookdecade1840, bookidpra, booksubjecttechnology
