B42D 3/00 - Definition

Definition statement

This subclass covers:

All kinds of book covers: hard or soft covers and particular details thereof, e.g. hinges, locks or closures, or permanent protective liners;

Book covers combined with other articles, e.g. with column markers, line or heading indicators or means for holding books open;

Particular devices for use with book covers, e.g. devices for protecting or reinforcing edges or corners of book covers;

Accessories for book covers or books not otherwise provided for, specially adapted for use therewith or for removable attachment thereto, e.g. protective jackets or protective book cases.

Relationship between large subject matter areas

Filing appliances

Filing appliances covered by B42F 7/00 - B42F 15/00 can comprise cover details similar to those of book covers, e.g. for protecting edges or corners. While book covers are intended to be permanently connected with fillings, filing appliances are intended for holding collections of papers, sheets, cards, or units thereof, in a way that each paper, sheet, card, or unit is individually insertable and extractable therefrom. Accordingly, the groups of B42F primarily provide classification places for cover features specially adapted for the filing purpose, e.g. for expansible cover splines, to adapt loose leave binders to an increasing collection, in B42F 13/38 or for covers with clamping backs in B42F 9/00.

Informative references

Attention is drawn to the following places, which may be of interest for search:

Manufacturing bookbinding cases	B42C 7/00
Jacketing books	B42C 15/00
Covers with clamping backs for filing purposes	B42F 9/00
Expansible cover splines of filing appliances with means for engaging perforations or slots	B42F 13/38
Backs or the like for suspended filing appliances	B42F 15/04