A book workstation includes a left cover and a right cover, a center spine, and pages sequentially arranged and bound to the center spine. The workbook includes at least one of: a) a left-side underlay and a left-side overlay, each bound to the left-side cover via a left-side spine, or b) a right-side underlay and a right-side overlay, each bound to the right-side cover via a right-side spine. In an open position, the pages can be split into left and right stacks. Indicia on a top page of the left stack are equivalent to indicia on a top page of the right stack. Relative orientations of the indicia enable each of a pair of users to view the indicia on one of the pages at the same time. Each underlay and overlay can be interleaved between pages of one stack, or placed on the top page of that stack.

A book workstation includes a left cover and a right cover, a center spine, and pages sequentially arranged and bound to the center spine. The workbook includes at least one of: a) a left-side underlay and a left-side overlay, each bound to the left-side cover via a left-side spine, or b) a right-side underlay and a right-side overlay, each bound to the right-side cover via a right-side spine. In an open position, the pages can be split into left and right stacks. Indicia on a top page of the left stack are equivalent to indicia on a top page of the right stack. Relative orientations of the indicia enable each of a pair of users to view the indicia on one of the pages at the same time. Each underlay and overlay can be interleaved between pages of one stack, or placed on the top page of that stack.

A bound sheet device such as a notebook is disclosed. The notebook includes a back cover and a front cover having multiple perforations aligned adjacent to an edge. The covers have one or more retaining apertures also adjacent to the edge and at one or both ends of the lines of perforations on one or both covers. There are a plurality of pages with multiple perforation corresponding with those on the covers. There is also a helical binder which extends through the perforations. The retaining apertures are different from the perforation and one or both ends of the binder are shaped to fit through the perforation but not the retaining apertures. Thus the binder is reusable allowing pages to be added and removed easily.

A bound sheet device such as a notebook is disclosed. The notebook includes a back cover and a front cover having multiple perforations aligned adjacent to an edge. The covers have one or more retaining apertures also adjacent to the edge and at one or both ends of the lines of perforations on one or both covers. There are a plurality of pages with multiple perforation corresponding with those on the covers. There is also a helical binder which extends through the perforations. The retaining apertures are different from the perforation and one or both ends of the binder are shaped to fit through the perforation but not the retaining apertures. Thus the binder is reusable allowing pages to be added and removed easily.

A binder for artists to record and retrieve color formulations comprises a plurality of sheets of paper that are adapted to accept both paint and text that relates to the specifics of a particular paint formula. Paint impermeable interleafing sheets are positioned between and overlie the respective sheets of paper to prevent bleeding between adjacent sheets. The sheets of paper and the interleafing sheets are adapted to be positioned between a front cover and a rear cover. The sheets of paper, the interleafing sheets, and the front cover and the rear cover are connected to a binding that holds the foregoing together. The sheets of paper are constructed and arranged to be removed and reinserted into the binding between the adjacent glassine interleafing sheets so that reinsertion after use, the applied paint can dry without smudging or contaminating adjacent sheets of paper.

A binder for artists to record and retrieve color formulations comprises a plurality of sheets of paper that are adapted to accept both paint and text that relates to the specifics of a particular paint formula. Paint impermeable interleafing sheets are positioned between and overlie the respective sheets of paper to prevent bleeding between adjacent sheets. The sheets of paper and the interleafing sheets are adapted to be positioned between a front cover and a rear cover. The sheets of paper, the interleafing sheets, and the front cover and the rear cover are connected to a binding that holds the foregoing together. The sheets of paper are constructed and arranged to be removed and reinserted into the binding between the adjacent glassine interleafing sheets so that reinsertion after use, the applied paint can dry without smudging or contaminating adjacent sheets of paper.

A binding apparatus including a plurality of generally coaxially arranged binding coils. Each binding coil includes a pair of generally parallel wires terminating in a tip. Each binding coil is coupled to an adjacent binding coil by a connection portion extending generally parallel to an axis of the binding apparatus. At least one binding coil is directly circumferentially attached to itself, or to a connection portion.

A loose-leaf binder comprises a back and a loose-leaf coil. The back comprises a lower sheet and an upper sheet. Each side of the back is formed with a track having a downward opening. At least one end of the back is formed with an open end portion. Each lateral side edge of the lower sheet is formed with a slightly upwardly projecting flange. The lower sheet is formed with at least one engaging slot corresponding to the open end portion of the flange. The loose-leaf coil to be selectively disposed below the back is formed with continuous C-shaped portions by bending a wire. Each end of each C-shaped portion is formed with a track section to slide in the track of the back. The track section can be selectively engaged and restricted within the engaging slot of the lower sheet of the back.

A loose-leaf binder device comprises a back, two end plugs that can selectively close two ends of the back, and a loose-leaf coil for binding inner pages and selectively disposed below the back. The back is formed with an insert slot. A retaining hole communicating with the insert slot is formed on a portion of the back abutting upon an end edge. The end plug is integrally formed with a resilient member to be inserted into the insert slot. A top surface of the resilient member is formed with one post corresponding to the retaining hole of the back. A free end of the resilient member is formed with an upward compressing edge. Thus, the post on the resilient member can be actuated through a compressing edge according to the resilient member of the end plug so that the post is selectively engaged with or disengaged from the back.

A fact sheet for insertion between two pages of a notebook, the notebook pages being bound by a spiral binding. The fact sheet includes a sheet having two generally parallel sides and, along one of the sides, a row of perforations into which the coils of the binding can be inserted to removably secure the sheet to the coils. The row of perforations includes a uniform alternation of oblong perforations and narrower perforations that are narrower than the oblong perforations. The alternation has a period including an oblong perforation and a narrower perforation, which are adjacent and consecutive. Each oblong perforation is shaped to receive either one coil or two coils, depending on the separation of the coils of the stationery product, and each narrow perforation is shaped to receive a single coil.