U.S. patent number 3,877,729 [Application Number 05/413,697] was granted by the patent office on 1975-04-15 for book leaf indexing arrangement.
Invention is credited to Arthur S. Friedman.
United States Patent |
3,877,729 |
Friedman |
April 15, 1975 |
Book leaf indexing arrangement
Abstract
A book comprising a sequential series of separate groups each
consisting of a plurality of consecutive leaves, and front and back
covers, has an indexing side edge marginal zone of narrow width
between its top and bottom edges. The first page of the first leaf
in each group bears in its marginal zone indicia identifying its
particular group. The indicia characters are arranged in
longitudinal sequence. The index side edge of the front cover is
recessed to provide a sight aperture which extends over the full
length of the indicia sequence coterminous therewith. Each group of
leaves is similarly recessed with an index sight aperture different
in length than any other sight aperture of the book. Beginning with
the group of leaves immediately following the front cover, the
sight aperture of each group is successively shorter in length than
the aperture of its immediate predecessor. A transparent plastic
window associated with the front cover overlies the entire sequence
of the sight apertures. The lower ends of all sight apertures
terminate in registry at and with the lower end edge of the cover
sight aperture at a point spaced above the bottom edge of the
book.
Inventors: |
Friedman; Arthur S. (New York,
NY) |
Family
ID: |
23638251 |
Appl.
No.: |
05/413,697 |
Filed: |
November 7, 1973 |
Current U.S.
Class: |
283/42;
281/37 |
Current CPC
Class: |
B42F
21/00 (20130101) |
Current International
Class: |
B42F
21/00 (20060101); B42f 021/00 (); B42d
003/00 () |
Field of
Search: |
;283/36-43,63R,35
;281/37,29 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Charles; Lawrence
Attorney, Agent or Firm: Dennison, Dennison, Townshend &
Meserole
Claims
I claim:
1. In combination: a book having front and back covers, separate
groups of consecutive leaves therebetween, one side edge of the
front cover having therein a longitudinal recess intermediate its
top and bottom edges and constituting an index sight aperture, each
group of leaves having in each leaf thereof an index sight aperture
similar to and in registry with the front cover sight aperture, the
length of the sight apertures common to each separate group of
consecutive leaves being shorter than the length of the front cover
sight aperture and being successively shorter from their upper to
their lower ends, the first page face of the first leaf of each
group of leaves having thereon indicia identifying that particular
group and located in the area between the upper end edge of the
sight aperture in the leaf on which it appears and the upper end
edge of the sight aperture in the immediately preceding group of
leaves, the marginal zone portions of all the book leaves and the
front cover being identical in size and shape between the lower
ends of their sight apertures and the bottom edge of the book, the
lower ends of all said sight apertures being in flush registry at a
height above the bottom edge of the book at least equal to the
distance between the upper end edge of the front cover sight
aperture and the upper end of the sight aperture in the first group
of leaves beneath the front cover; and a rectangular sheet of
transparent plastic material doubled upon itself in U-shape to
provide a bight portion, said transparent sheet encasing the inner
and outer faces of the front cover in such manner that said bight
portion completely encases the entire index side edge of the front
cover and overlies all the sight apertures of the book leaves and
front cover with a double thickness of the transparent sheet
extending from the top to the bottom edges of the front cover,
thereby providing reinforcement for the marginal edge zone portions
of the front cover between the ends of its sight aperture and the
adjacent end edges of the cover.
Description
BACKGROUND
The field of the present invention is the art of book leaf
indexing.
The prior art in general makes use of leaf-associated visual aids
arranged for quick selection of clearly identified different
portions or sections of a book. Some examples of such aids are
leaf-attached edge tabs, thumb notch cut outs, leaf edge grooves,
etc. For the most part, such aids are not accessible for viewing so
long as the front cover of the book is closed, and when the cover
is opened for thumbing the leaves, those aids that are associated
with the leaves proximate the bottom edge zone of the book are
subjected to greater flexation and consequent greater wear and tear
than those aids associated with upper portions of the book leaves.
This is particularly true of small books such as personal telephone
directories, address books, pocket dictionaries, memorandum
booklets and the like.
SUMMARY OF THE INVENTION
In the book of the present invention the leaves are arranged as a
sequential series of separate groups individually identified by
appropriate indicia on the first page of the first leaf in each
group. All the indicia characters are arranged in linear sequence
extending longitudinally intermediate the top and bottom edges of
the book in a narrow marginal zone at its index side edge and are
visible through a transparent plastic window associated with the
front cover. The index side edge of the cover has a longitudinal
cutout recess intermediate its top and bottom edges which provides
a sight aperture extending over the full length of the sequence of
indicia, whereby they are visible through the closed cover and the
plastic window means associated therewith. Each group of leaves is
similarly formed with an individual index sight aperture of
successively shorter length such that no indicia character of any
group is concealed or overlapped by any portion of the group which
precedes it. The uncut marginal zone portions of the cover and
leaves between the lower end of the indicia sequence and the bottom
edge of the book are of identical size and shape and are in precise
registry, thereby providing reinforcement which prevents undue
flexing of the lower end portions of the leaves.
DRAWINGS
FIG. 1 is a perspective view of the book comprising the present
invention, with the cover in closed position.
FIG. 2 is a section through the front cover on line 2 -- 2 of FIG.
1.
FIG. 3 is a perspective view of the front cover, window sheet, and
the first two leaves, all in partly open position, of an
alternative arrangement of the book assembly.
DETAILED DESCRIPTION
In the specific embodiment herein disclosed, the book includes a
front cover 10 of flexible cardboard or the like, a back cover 11
of similar material, and a plurality of flexible paper leaves 12
therebetween. The front cover is encased in a sheet of flexible
transparent plastic 13 folded upon itself at its mid portion to
engage over the indexing side edge of the cover in contact with the
outer and inner faces thereof and with the free ends of the sheet
flush with the opposite side edge of the cover. If desired, a
similar plastic sheet may be employed to encase the back cover 11.
All the leaves 12 and folds of the transparent plastic sheet or
sheets are attached to a spiral ring binder 14 at the side edge of
the book opposite its indexing edge.
The indexing side edge of the front cover 10 is formed with a
narrow longitudinal sight aperture having its inner edge 15 spaced
inward from the bight of the transparent plastic sheet 13 and
parallel thereto. Each end of the sight aperture terminates
inwardly from its adjacent top or bottom edge of the cover and is
spaced sufficiently from the edge to leave substantial marginal
zones 16 and 17 of the cover extending between the end of the sight
aperture and the adjacent top or bottom edge of the cover. These
cover portions reinforce the plastic sheet 13 bight portion and
prevent undesired flexation thereof.
In the front cover arrangement shown in FIG. 1, the upper marginal
zone portion 16 of the cover and the corresponding face areas of
the plastic sheet 13 are cut out to provide an arcuate
thumb-receiving recess 18. In the arrangement shown in FIG. 3 the
thumb recess is eliminated. In an alternative arrangement (not
shown), the recess 18 may be simply an extension of the index sight
aperture.
Each leaf 12, in its indexing side edge area underlying the index
sight aperture of the front cover 10, is formed with an individual
sight aperture identical to the cover sight aperture in all
respects except length. Preferably, the leaves are arranged as
separate groups, each comprising a plurality of consecutive leaves
in which the index sight apertures are in registry and identical in
all respects. The sight apertures common to any individual group
are different in length from any other group, and the first page of
the first leaf in each group is provided with indicia 19
distinctively identifying that particular group. As best seen in
FIG. 3, the indicia in each case is located immediately above the
upper end of the index sight aperture of the leaf on which it
appears, and in longitudinal alignment with the aperture.
The index sight aperture in the front cover 10 is the greatest in
length. The sight aperture common to the first group of leaves
following the cover is shorter in length by the amount of space at
its upper end that is occupied by the identifying indicia for that
group. In like manner, the sight aperture individual to each
succeeding group is similarly shorter in length than sight aperture
of its immediately preceding group. At their lower ends, however,
all the sight apertures of the leaves terminate in registry with
and at the upper edge of the lower marginal zone portion 17 of the
front cover 10. In consequence, each leaf has at its lower end and
index margin portion 20 corresponding exactly to the marginal zone
portion 17 of the front cover, as best seen in FIG. 3. The
provision of these portions 20 is a salient feature of the present
invention. Each leaf portion 20 covers and protects the one
immediately following it. In effect, the superposed portions 20
constitute a stack which reinforces the lower end area of the index
side edges of the leaves against undue flexing.
In the arrangement illustrated in FIG. 3, the transparent plastic
sheet 13 which encases the front cover in FIG. 1 is eliminated and
replaced by a single transparent plastic sheet 21 inserted between
the front cover and the first one of the leaves. The index side
edge portion of the sheet 21 overlies all the index sight apertures
of the leaves.
* * * * *