A method of making a book or booklet cover including placing a first face of a sheet-like information carrier on a first side of a metal sheet that extends beyond one edge of the sheet-like information carrier. The method including bending a portion of the metal sheet along an edge thereof, for the portion to elastically press on the sheet-like information carrier.

A book or booklet cover including a metal sheet supporting a sheet-like information carrier, which sheet-like information carrier has a first face and an opposite second face, with the second face on a first side of the metal sheet, the metal sheet-having a portion extending beyond at least one edge of the sheet-like information carrier, where the portion of the metal sheet has a rounded bend along an edge thereof, the portion elastically pressing against the sheet-like information carrier.

Disclosed herein is a binder clip. The binder clip includes: a body formed by integrating an elastic plate and clamping surfaces with one another, and provided with fastening portions; first and second grips each coupled to both sides of each of the clamping surfaces of the body, and configured to open the fastening portions; first and second rotatable hinges rotatably disposed around ends of the first and second grips; first and second supports each coupled and fastened to a corresponding one of the first and second rotatable hinges, and configured to have a round bar shape and a same torque; and a socket provided with a connection hole configured such that second ends of the first and second supports are fastened into both sides thereof and are connected to the socket, and configured to have the same torque and rotational threads on the inner surface of the connection hole.

Disclosed herein is a binder clip. The binder clip includes: a body formed by integrating an elastic plate and clamping surfaces with one another, and provided with fastening portions; first and second grips each coupled to both sides of each of the clamping surfaces of the body, and configured to open the fastening portions; first and second rotatable hinges rotatably disposed around ends of the first and second grips; first and second supports each coupled and fastened to a corresponding one of the first and second rotatable hinges, and configured to have a round bar shape and a same torque; and a socket provided with a connection hole configured such that second ends of the first and second supports are fastened into both sides thereof and are connected to the socket, and configured to have the same torque and rotational threads on the inner surface of the connection hole.

A clip includes a resilient clip body and a pair of lever arms for opening and closing the clip body, which defines a chamber for retaining or bundling loose articles, such as cords. The clip body has a pair of lever contact zones disposed between a forward end portion and an arcuate rear portion, each of these zones and portions cooperating with the others to define the article-retaining chamber. The arcuate rear portion has a concave-inward shape and the forward end portion defines an opening at least when opened in response to an inward compressive force applied to the lever arms at a location spaced rearwardly from the lever contact zones of the clip body. Optionally, the resilient clip body defines an opening at the forward end portion, even when it is in a relaxed state, such as to facilitate selective removal of bundled articles from the chamber.

A reusable paperclip can accommodate a large range of paper stack sizes. It is configured to bind a stack from one corner without becoming distorted in shape when used on a large stack. The clip has vertical members to prevent horizontal and vertical movement of the stacked papers and connected horizontal members to apply pressure to the surfaces of the stack to frictionally bind the stacked papers. The clip is easily placed and removed by the user, and allows a person to view all information on a standard formatted page with little to no obstruction of the printed information. The clip also allows a user to flip though a stack of papers and easily remove individual papers from the stack or insert additional pages without disturbing the sheets and without the need to remove or adjust the position of the clip.

A reusable paperclip can accommodate a large range of paper stack sizes. It is configured to bind a stack from one corner without becoming distorted in shape when used on a large stack. The clip has vertical members to prevent horizontal and vertical movement of the stacked papers and connected horizontal members to apply pressure to the surfaces of the stack to frictionally bind the stacked papers. The clip is easily placed and removed by the user, and allows a person to view all information on a standard formatted page with little to no obstruction of the printed information. The clip also allows a user to flip though a stack of papers and easily remove individual papers from the stack or insert additional pages without disturbing the sheets and without the need to remove or adjust the position of the clip.

To provide a double clip that can reduce a force for an opening operation while maintaining a length of lever members as long as conventional ones, a double clip 1 includes a clip main body 10 and a pair of lever members 30. The clip main body has two plate-shaped portions 11, 12 and a bottom plate portion 13 connecting thereto. An opening portion 14 is formed by the plate-shaped portions abutting with each other by virtue of elasticity thereof. The lever members are formed long and connect to the plate-shaped portions. First fulcrum portions 11a, 12a are formed between the plate-shaped portions and the lever members to constitute fulcrums of the lever members when they perform an opening operation. The first fulcrum portions are disposed closer to a bottom plate portion side than a central position of a distance from the bottom plate portion to the opening portion.

A clip includes a resilient clip body and a pair of lever arms for opening and closing the clip body, which defines a chamber for retaining or bundling loose articles, such as cords. The clip body has a pair of lever contact zones disposed between a forward end portion and an arcuate rear portion, each of these zones and portions cooperating with the others to define the article-retaining chamber. The arcuate rear portion has a concave-inward shape and the forward end portion defines an opening at least when opened in response to an inward compressive force applied to the lever arms at a location spaced rearwardly from the lever contact zones of the clip body. Optionally, the resilient clip body defines an opening at the forward end portion, even when it is in a relaxed state, such as to facilitate selective removal of bundled articles from the chamber.

A binder clip includes a generally triangular clamp, a catch arm, and a hook arm. The catch arm includes a linear segment having a catch width, and the hook arm includes a hook configured for secure but releasable connection around the linear segment of a matching binder clip. The hook has a hook width less than the catch width of the linear segment.

A u-shaped binding element comprising a u-shaped element main body made of steel material or aluminium alloy which is molded by a tension process, wherein one or two up ends of the u-shaped element main body is or are wrapped with anti-drop adhesive tape; wherein if one up end of the u-shaped element main body is winded with the anti-drop adhesive tape, a single-side molding body is formed; if two ends of the u-shaped element main body are covered with are respectively winded with the anti-drop adhesive tape, a double-side molding body is formed, a wrapage is covered on an external surface of the single-side molding body or the double-side molding body to form the u-shaped binding element. Utilizing the binding sleeve and a binding machine is capable of quickly completing text sheet binding and effectively solving the first requirement of binding: convenient and reliable, so as to make the binding more reliable, fast and convenient.