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| Number | Title | Issue Date |
| 4075726 | Method and apparatus for binding a book In a book binding apparatus, a book to be bound is clamped between a pair of plates, the distance between the clamps controlling the distance between a pair of groove bars engaging a cover to be bound to the book. A backup roll is positioned to engage the... | 02/28/1978 |
| 3960714 | Centrifugal separator with rotary distributor A centrifugal separator is provided with a rotary distributor provided with a plurality of vertically spaced coaxial rotating disks, in which the upper rotating disk is of smaller diameter than the lower rotating disk. The distance between the disks may b... | 06/01/1976 |
