Patent ID: 7805815

Claim:
A clip for attaching to a sheet, the sheet having an aperture spaced apart from a leading edge of the sheet, said clip comprising: a generally planar lower member, said lower member having a leading edge and a trailing edge; a generally planar upper member extending across said lower member, said upper member having a leading edge, a trailing edge and an opening between said leading edge and said trailing edge; said trailing edge of said upper member attached to and extending from said lower member proximate said trailing edge of said lower member; said upper member having: a spring proximate said trailing edge of said upper member and extending into said opening in a direction from said trailing edge to said leading edge, said spring operable to apply a force against the leading edge of the sheet located between said lower member and said upper member; and a catch stem proximate said leading edge of said upper member and having a catch notch facing said spring, oppositely disposed across said opening from said spring and extending into said opening in a direction from said leading edge to said trailing edge, said catch notch having a first surface generally parallel to the sheet located between said lower member and said upper member, a stop surface and a cam surface extending from said first surface to said stop surface, said catch notch operable to catch upon a sheet edge bounding the aperture spaced apart from the leading edge of the sheet located between said lower member and said upper member and prevent the sheet from being removed from the clip.