Patent ID: 7757358
Filing Date: 2010-07-20
Classification: B42F,Y10T

Abstract:
1. A spring clamp binder, comprising: a cover; a first spring clamp and a second spring clamp, each of the first and second spring clamps defining a respective holding volume; a datum bar comprising a spacer extending through the holding volume of each of the first and second spring clamps, and the datum bar further having a planar datum surface comprising: wherein the first and second surface region projections have respective planar surfaces that are co-planar with the planar datum surface, wherein the first spring clamp is spaced apart from the second spring clamp along the longitudinal axis such that a gap exists between the first and second spring clamps, wherein the first and second surface region projections are located in the gap, wherein the planar datum surface and the planar surfaces of the first and second surface region projections are exposed to engage leading edges of media sheets inserted into the holding volume of each of the first and second spring clamps.