Improvements in Bookbinding.
Year: 1890

page_text: Date of Application, 25th July, 1890
Complete Specification Left, 23rd Apr., 1891-Accepted, 30th May, 1891
.PROVISIONAL SPECIFICATION.
Improvements in Bookbinding.
I, RICHARD BIRDSALL of 44 Wood Street Northampton, in the County of
Northampton Wholesale Bookbinder and Stationer do hereby declare the nature of
this invention to be as follows:-
The object of this invention is to render the back of one sheet of every section
of a book untearable and then to fasten the sheets comprising the section so firmly
together that the inner sheets (technically called insets) are securely held to the
untearable sheet independently of and in addition to, the stitches subsequently used
to sew the sections together into a book, and further so to line the back of the
outer sheet of cach section that when the book is subsequently glued in binding,
every section becomes more securely attached to its neighbours.
I first line or bind the back of the outer sheet of each section with a strip of
linen, pasting it however so that half the width of the linen flies loosely and then
opening the section out flat. I run by means of a sewing machine a row of stitches
about one quarter of an inch long, from end to end-down the fold of the back of
the section and through the linen.
Then I refold the sections as before, and form them into a book by sewing them
a second time to cords or tapes or other like material.
In glueing the back of the book.after sewing the glue penetrates through the
aforesaid loose half of the strip of linen and causes it to be attached firmly to the
section next adjoining, preventing separation between the sections in subsequent
wear.
The advantages of this double sewing are that the inner sheets of every section
are secured independently of the stitches used to sew the book together, so that
when in heavy wear, the thread used for the latter purpose enlarges the needle
holes, the sheets are independently held and are still most firmly secured. Moreover
in the event of the ordinary thread breaking the insets do not in consequence
become loose and the leaves fall out.
Any other sheet of a section may be lined with linen, or books may be sewn as
described without linen.
Wherever the word sheet is used, two attached leaves are meant, similar to an
ordinary sheet of note paper.
521 7
1000
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Bookbinding.
I, RICHARD BIRDSALL of 44 Wood Street, Northampton, in the County of
Northampton, Wholesale Bookbinder and Stationer do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The object of this invention is to render the binding of books exceedingly strong
and durable. The invention is therefore particularly applicable to books which
are subjected to heavy wear.
According to the first part of my invention I provide means for rendering the
outer sheet of a number or of the whole of the sections of a book untearable and
in such a manner that when glue is subsequently applied the aforesaid sections are
thereby most firmly attached to their neighbours.

page_text: According to the second part of my invention I fasten the sheets comprising
each section so securely together that the inner sheets (technically called insets)
are firmly held to the outer sheet independently of the stitches subsequently used
to sew the sections together into a book.
Referring to the aforesaid first part of my invention I line the back of the outer
sheet of such sections that I desire thus to strengthen with a strip of thin and
porous linen and in the manner following. First I cut strips of linen about half
an inch wide and equal in length to the length of the backs of the sheets and lay
them flat on a board, then I run a narrow streak of paste along one side of
the back of the folded sections and lay each down on a strip of the linen keeping
the fold of the section in a line with the centre of the linen strip. One half of the
width of a strip of linen thus adheres to one side of each of the folded sections
and the other half of the said strip flies loosely and when it is dry I fold such
loose half of the strip round the back of the section.
The effect of leaving one half of the width of this folded strip of linen
unattached by paste to the back of the section is that (without the necessity of
running a streak of paste up between each section during or after the sewing of
the book) when I coat the back of the book with hot glue in the subsequent process
of binding it penetrates into the loose half of the strip of linen, and causes it to
adhere firmly to the section next adjoining that to which it was first attached, thus
making a flexible linen joint between the sections and preventing their separation
in heavy wear.
The second part of my invention may be used alone (that is to say with an
ordinary binding) or with the afore described first part of my invention, and
consists in opening out the sections of the book flat and by means of a sewing
machine running a row of stitches, each about one quarter of an inch long down
the centre of the fold of the back of each of the sections, after this I refold the
sections as before and form them into a book by sewing them a second time to
cords or tapes or other like material in the usual way.
The advantages of this double sewing are that the inner sheets of every section
are secured independently of the stitches used to sew the book together, so that
when in heavy wear the thread used for the latter process enlarges the needle
holes, the sheets are independently held and are still firmly secured, moreover in
the event of the ordinary thread breaking the insets do not in consequence become
loose and the leaves fall out.
Wherever in the above description the word "sheet" is used, two leaves are
meant as in an ordinary sheet of note paper.
I have, in the foregoing, named linen but I do not confine myself to it, as calico
or other fabric or sheet material may be substituted though with imperfect results.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :
1. The use and application of a flexible linen joint between the sections of a
book by first lining them each with a partially attached strip of porous linen and
then after sewing, coating their backs with hot glue for completely attaching said
strips substantially as hereinbefore described.
2. The application and use of a row of stitches along the centre of the fold of
the section for securing all the sheets within it together the said row of stitches
being used in addition to the stitches for sewing the sections together into a book
substantially as hereinbefore described.
lay of April 1891.
ny
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.