Books – strips – and leaves – Book – element thereof – or accessory therefor – Binding
Patent
1988-03-29
1989-05-23
Bell, Paul A.
Books, strips, and leaves
Book, element thereof, or accessory therefor
Binding
412 39, B42B 512
Patent
active
048323705
ABSTRACT:
A binding element for perforated sheets of the type comprising a length of wire bent so as to form curved prongs on which the sheets may be impaled, the wire being in the shape of a flat comb, the prongs of which are closed at their tips and opened at their bases or roots which are connected to their neighbors by aligned lengths of wire forming the stock or the spine of the comb, the strip being designed to be converted to a slotted tube by suitable bending of the prongs. In accordance with the invention the concave surface with part of each prong which is midway between its tip and root is formed with an indentation, which indentation assists the closing of the binding element very effectively and without any visible sign.
Bell Paul A.
James Burn International Limited
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