Teaching aid for tabular data - has folded sheet bound into book with perforations to allow extraction

Teaching aid for tabular data - has folded sheet bound into book with perforations to allow extraction

A teaching aid is used for the representation of tables and standard lists. It uses perforated sheets that are readily removed for insertion into a binder or folder. A sheet containing data is correctly bound into the main section of a book. The sheet is folded and has perforations (6) at the fold l...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: DAEHMLOW, HELMUT, 4040 NEUSS
Format: Patent
Sprache:eng
Schlagworte:
ADVERTISING
APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE
CRYPTOGRAPHY
DIAGRAMS
DISPLAY
EDUCATION
EDUCATIONAL OR DEMONSTRATION APPLIANCES
GLOBES
PHYSICS
PLANETARIA
SEALS
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Beschreibung
Zusammenfassung:A teaching aid is used for the representation of tables and standard lists. It uses perforated sheets that are readily removed for insertion into a binder or folder. A sheet containing data is correctly bound into the main section of a book. The sheet is folded and has perforations (6) at the fold line and near to the binding (5). Holes are provided (7, 8) for allowing the sheets to be entered into a ring folder. The book may be produced with transparent sheets to allow sections to be copied.