US1027833A - Semicylindrical-stereotype-plate trimmer. - Google Patents

Description

J. 1:". FREY. SEMIGYLINDRIGAL STEREOTYPE PLATE TR'IMMER.

APPLICATION FILED MAY 19, 1911.

Patented May 28, 1912.

COLUMBIA PLANQGRAPH co.. WASHINGTON. n. n

SEMIiCYLINDRICAL-STEREOTYPE-PLATE TRIMIVIER.

Specification of Letters Patent.

Patented May 28,1912.

Application tiled May 19, 1911. Serial No. 628,330.

To all whom t may concern: c

Be it known that I, JOHN FREMONT Finir, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Improvement in Semicylindrical- StereotypeIlate Trimmers, of which the following is a specification.

There is at the present time upon the market a machine, known as an automatic curved stereotype plate finishing and cooling machine, which is so designed as to receive curved stereotype plates from the casting box, trim the same ready for placing in the press, and properly cool it for transference to the press. Such an apparatus is eminently successful if sutlicient time is allowed to elapse bet-Ween the pouring of the metal and its transference to the machine in question but if, under stress of hurry incidentto a special edition, or otherwise, the operators remove the plates from the casting box and begin manipulation thereof in the machine in question at too early a period, I have foundthat a large percentage of loss occurs.

The object of my present invent-ion is, therefore, to provide an attachment to or improvement of the said machine in order to overcome this diiiiculty and thereby materially increase the speed at which complete stereotype plates may be produced and delivered to the press room. y

The accompanying drawings illustrate my invention.

Figure 1 is a perspective View of the above mentioned machine equipped with my improvements; Fig. 2 a fragmentary horizontal section showing my improvements; Fig. 3 a transverse section through the trimmer head, and Fig. 4 an axial sect-ion of one of my attachments.

In the drawings, 10 indicates the main body of the machine to which reference has been made. This machine comprises a saddie 11 having a semicylindrical delivery end 12 which is machined to fit snugly the stereotype plate 20. Arranged upon opposite sides of the saddle 11, in front of the portion 12, are horizontal guide surfaces 13, 13, which deliver to rotating milling cutters 14, 14, which are so arranged as to trim the opposite axial edges 15 of the stereotype plate. The plate is driven by hand over the cutters 14 along the saddle 11 and, by the portion 12 is guided into the trimmer read 1G in which the plate is trimmed and properly chamfered at its ends. From this head the plate is delivered to the cooling chamber 17. Thus far the structure is one commonly in use and I have found that in the operation of such a structure if I take a plate `from the casting box too soon so that the metal is not firmly set, although still apparently of suiiicient hardness, there will be a slight sagging of the plate on the sadr*dle and a consequent very slight outward expansion of the edges or ends of the semicylinder so that, when the plate is projected into the trimmer head, the type faces of a few of the type lines immediately adjacent the edges of the plate will contact with the inner face of the trimmer head in such manner as to become scratched and so marred as to ruin the plate for use. sagging of the plate is very small indeed, but, as will be recognized, a difference of one-hundredth of an inch or even less in the height of the type is very appreciable in the printed result.

In my operation of a machine of this class, I have discovered that all possible injury of the plate in the manner described may be avoided in the following manner: Upon the receiving end of the trimmer head, at diametrically opposite points relative to the guide 12, I iirmly clamp a bracket 25 which, at its inner end, carries a roller 2G, the axis of which is at right angles to the axis of the saddle 11 and the plate 20. The roller 26 is formed of any suitable cushion material, such, for instance, as leather, hard felt, etc., of such character that, while it is capable of exerting a very iirm clamping force upon the plate, it will, nevertheless, be so yielding as to accommodate itself to the type face of the plate without marring the type. The brackets 25 are bolted to the trimmer head 16 by bolts 27 or otherwise, said bolts preferably passing through slots 2S in the bracket so that t-he rollers 26 may be accurately adjusted relative to the saddle guide 12. The brackets, of course, might be backed up by heavy springs but these are not at all necessary and, therefore, I prefer to omit them. In practice, I have found that with this attachment I am able to take the plates from the casting box much sooner than heretofore and yet run them through the machine without danger of loss by scratching, whereas heretofore it was not at all unusual to lose as high as forty per This expansion or face arranged to act upon the type face of the plate as it enters the trimmer head to prevent spread of the edges of the plate l5 Without marring the type faces.

In Witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, this 16th day of May, A. D. one thousand nine hundred and eleven.

JOHN FREMONT FREY. [n s] itnesses ARTHUR M. Hoon, FRANK A. FAHLE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C.

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