A binder is described which is operable to bind together pages of a document using a comb, the binder including a punch mechanism operable to punch a line of holes close to one edge of the pages of the document, and a comb opening mechanism to enable the punched pages to be placed on the comb, the comb opening mechanism having a user operable control. The binder further includes a user operable control for selection of the comb size to be used to bind the document which automatically determines at least two settings of the binder.
1. A binder operable to bind together pages of a document using a comb, the binder including a punch mechanism operable to punch a line of holes close to one edge of the pages of the document, a back margin adjustment mechanism for setting the distance from the one edge of the pages of the document at which the holes are punched, and a comb opening mechanism to enable the punched pages to be placed on the comb, the comb opening mechanism having a user operable control, wherein the binder further includes:
a user operable control for selection of the comb size to be used to bind the document which automatically determines the setting of the back margin adjustment mechanism and at least one other setting of the binder.
2. A binder according to claim 1 wherein the binder further includes a comb opening stop for controlling the degree to which the comb is held open by the comb opening mechanism, and the setting of the user operable control for selection of the comb size automatically determines the setting of the comb opening stop.
3. A binder according to claim 2 wherein the user operable control for the comb opening mechanism has a first stop formation and the user operable control for selection of the comb size includes a second stop formation, the second stop formation limiting the movement of the first stop formation, and thus the user operable control for the comb opening mechanism, dependent upon the setting of the comb size.
4. A binder according to claim 1 wherein it further includes means for measuring the document thickness.
5. A binder according to claim 4 wherein the means for measuring the document thickness includes a hopper into which the pages of the document to be bound are placed.
6. A binder according to claim 5 wherein the hopper has within it a scale onto which the pages of the document to be bound are placed and from which the document thickness can be read by a user.
7. A binder according to claim 6 wherein the punch mechanism is capable of punching a group of pages at one time, and the hopper has within it a comb, having upstanding teeth and indentations therebetween, onto which the pages of the document to be bound are placed such that alternate groups of pages are supported in the indentations and on the teeth, such that the user can readily pick up a group at once for punching, and each group is of the correct number of pages to be punched at one time by the punch mechanism of the binder.
8. A binder according to claim 5 wherein the punch mechanism is capable of punching a group of pages at one time, and the hopper has within it a comb, having upstanding teeth and indentations therebetween, onto which the pages of the document to be bound are placed such that alternate groups of pages are supported in the indentations and on the teeth, such that the user can readily pick up a group at once for punching, and each group is of the correct number of pages to be punched at one time by the punch mechanism of the binder.
9. A binder according to claim 1 wherein a drive mechanism links the user operable control for selection of the comb size to the back margin adjustment mechanism.
10. A binder according to claim 9 wherein the drive mechanism includes a first toothed wheel secured for rotation with the user operable control for selection of the comb size, a toothed belt, a second toothed wheel driven by the belt, the second toothed wheel providing cam surfaces for operation of a cam follower to operate the back margin adjustment mechanism.
11. A binder according to claim 1 wherein the user operable control for selection of the comb size, or a part secured for rotation with it, is marked with the different diameters of comb available, and the user sets the control on the basis of the document thickness.