EP 0918105 A3 20000329 - Process and apparatus for the deacidification of books
Title (en)
Process and apparatus for the deacidification of books
Title (de)
Verfahren und Vorrichtung zur Entsäuerung von Büchern
Title (fr)
Procédé et dispositif de déacidification de livres
Publication
Application
Priority
DE 19751673 A 19971121
Abstract (en)
[origin: EP0918105A2] The system to reduce the acid contained in books and documents, through their paper compositions, has a hermetically sealed chamber (21) to take the books. The chamber has an inner vacuum. Powder, to build up an alkaline reserve in the books, is eddied out of a supply container and carried to the book pages in an air stream. The powder is carried in a turbulent air stream. Two opposing air streams, at 180 degrees to each other, are directed at the books in the chamber (21). The books, in the chamber (21), are horizontal with their spines downwards, and are opened by about 90 degrees . The books are initially cleaned by a preheated air stream. The opened books are moved to and fro in the air stream(s). The eddied powder in the supply chambers is drawn into the chamber (21) by the vacuum. The books are heated by the air stream(s) and, after dusting with the powder, are treated with steam with heating to prevent steam condensation. The books are cleaned of any residual powder by an air stream. The books are initially cleaned to remove any dust or loose paper particles, and then treated by the application of powder to the pages. The treated pages are conditioned by steam, followed by cleaning to remove any surplus powder. The powder is preferably MgO. An Independent claim is included for an assembly, where the books are arranged in a cassette trolley, which is moved to and fro within the chamber (21). Preferred Features: The book cassettes have side walls to enclose an inner zone of 90 degrees , and form an angle of 45 degrees to the upper side of the trolley. The side walls are adjustable for the book widths, and have openings to secure the book covers. The chamber (21) has a closure to give a hermetic seal against the ambient atmosphere.
IPC 1-7
IPC 8 full level
B41M 7/00 (2006.01); D21H 25/18 (2006.01)
CPC (source: EP)
B41M 7/0063 (2013.01); D21H 25/18 (2013.01)
Citation (search report)
- [Y] DE 4436635 A1 19960418 - BELL OSWALD DR [DE]
- [Y] US 4522843 A 19850611 - KUNDROT ROBERT A [US]
- [A] US 5679308 A 19971021 - OYE RAYSABRO [JP], et al
- [A] WO 9003466 A1 19900405 - LITHIUM CORP [US]
- [A] US 5120500 A 19920609 - EGGERSDORFER ROLF [DE], et al
- [A] US 4863566 A 19890905 - WARREN MORRIS J [US], et al
- [A] US 5433827 A 19950718 - PAGE DEREK H [CA], et al
- [A] BRANDIS, LEANNE: "Summary and evaluation of the testing sponsored by the Library of Congres of books deacidified by the FMC, Akzo and Wei T'o mas deacidification processes", RESTAURATOR (1994), 15(2), 109-27, XP002128248
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0918105 A2 19990526; EP 0918105 A3 20000329; EP 0918105 B1 20081008; AT E410550 T1 20081015; DE 19751673 C1 19990923; DE 59814297 D1 20081120
DOCDB simple family (application)
EP 98114273 A 19980730; AT 98114273 T 19980730; DE 19751673 A 19971121; DE 59814297 T 19980730