Practical Bookbinding

Rounding,

Rotary g

ays trimmed on three sides, that is, before the book is rounded each side is cut one after the other. This method has the advantage that it is qu

is first cut at the front, rounded,

valuable tool, it would not pay to use it now, and the shops where it is still in use are few and far between; besides, our Ge

Lever gu

ops and small books. Rotary action is for heavier work and is

erved in trimming is that as little as ever possible should be taken off the book. Measuring and marking for trimming are done with the dividers; the latter is called "marking for cutting." When the back gauge has been adjusted so that the points lie directly u

thick board on the under side of the clamp. If a piece of stout cloth has been pasted to this board, it will afterwards be easily removed from the cla

e fastened to the clamp in a simple way, either by sc

tom edge parallel. After cutting this edge, the book is turned round and the bottom edge adjusted on the back gauge so as to get the top edge ready for cutting.

nged for trimming whe

cut from left to right, the

e thin places must be properly packed with paper or strips of board, otherwise the knife is sure to tear or jag, no

m sheets through cutting on a much-used bed,

made at the back to which the boards have to be fitted. For this reason

Rounding

operly speaking the process is as follows: The left hand takes hold of the back of the book lying flat before the worker a

the back is evenly rounded. The rounding of the f

the middle the book is called "flat rounded." The latter occurs when the thread used in sewing has been too thin or held down too much (see page 37). Great care must be taken to avoid what is called

achines. The work connected with these consists simply in turning

Rounding

de groove should be a little deeper than the board set in it. The book and backing boards are placed in a wooden press, screwing up by hand and once more carefully adjusting. To do this, the press is first placed lengthwise on the table so that one end projects a little over the front edge of the table; the evenness of the rounding is then perfected-one hand at the back and the other at

finished; it must be done with the greatest exactitude and requires much practice. Although it is

sible with the screw key, and through this the grooves already project over the edges o

hole of the back is well pasted, and after remaining thus a short time it is then rubbed with the point of the hammer along the sheets until all superfluous glue is soaked and scraped off. W

ng machine fo

r clamping only, and the making of the groove is done with the ordinary hammer. For large sho

ng machine fo

ned by backing first. The work of backing remains the same. If the fore-edge has already been trimmed, care must be taken that the grooves do not suffer during trimming after backing. One way of effecting this is

; to do this a strong cord is tied round the book about 1-1/2 cm. from the back, the book is

book arranged

held in the left hand whilst the right holds the hammer and

nd it is not until the trimming is

he same size can be done in the h