Abstract The leaves of a book are arranged as separate sections each constituted of a batch of consecutive sheets of the same fiber containing paper and having a turning axis common thereto. The first sheet in each batch carries indicia identifying that particular batch. The fibers of all the batch leaves are oriented in a direction parallel to their turning axis. Immediately preceding the first leaf of each batch an indexing leaf is inserted. Each indexing leaf is made of the same paper as the batch leaves, but its fibers are oriented in a direction substantially normal to the turning axis of the leaves. This arrangement assures that the flexibility and resilience of the indexing leaves are different from the flexibility and resilience of the batch leaves. When the book is thumbed, the differences are effective to bring about a noticeable retardation in the rate of turnover of the leaves as each indexing leaf is reached. The action is automatic.
Inventors
👤 Arthur S Friedman
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-06 08:25
CPC Classifications
B; B42; B42F; B42F21/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
In a book having a sequential series of separate sections each constituted of a batch of consecutive leaves made of paper containing parallel fibers all oriented in the same direction, and an indexing leaf made of the same paper as the batch leaves and immediately preceding the first leaf of each batch, the fibers of each indexing leaf being oriented in a direction different from the direction of orientation of the batch leaf fibers, both the batch and indexing leaves having a common turning axis, the direction of orientation of the batch leaf fibers being substantially parallel to said axis and the direction of orientation of the indexing leaf fibers being substantially normal to said axis.
Claim 2
Dependent Claim
116 words
In a book having a sequential series of separate sections each constituted of a batch of consecutive leaves made of paper containing parallel fibers all oriented in the same direction, and an indexing leaf made of the same paper as the batch leaves and immediately preceding the first leaf of each batch, the fibers of each indexing leaf being oriented in a direction different from the direction of orientation of the batch leaf fibers, both the batch and indexing leaves having a common turning axis, the direction of orientation of the batch leaf fibers being substantially parallel to said axis and the direction of orientation of the indexing leaf fibers being substantially normal to said axis.
Claim 3
Dependent Claim
19 words
In the book of claim 1: all said batch and indexing leaves being of the same size and configuration.
Claim 4
Dependent Claim
39 words
In the book of claim 1: the first leaf in each batch having thereon a distinctive identification indicia containing area adjacent its indexing side edge; and all said areas being in registry from front to back of the book.
Claim 5
Dependent Claim
22 words
In the book of claim 1: a front cover; and thumb positioning guide means thereon in registry with said indicia containing areas.