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Board Shear
Used extensively in bookbinding, a board shear is a large, hand-operated machine for cutting board or paper. Like scissors, a board shear uses two blades to apply shear stress exceeding the paper's shear strength in order to cut. The stationary blade forms the edge of the cutting table, with the moving blade mounted on a cutting arm. Originally known as a table gauge shear because its gauge allowed the cutting of consistently-sized materials, the board shear resembles a larger version of the paper cutters commonly found in offices. The earliest known reference to a board shear comes from an 1842 supplement to ''Penny Magazine'', titled ''A Day at a Bookbinder's'', which included a drawing of a board shear with many of the major developments already present. An 1854 article on the history of bookbinding from ''The Bookbinder's Trade Circular'' describes early board shears, and places their development in "about 1836"; credit for the invention is ascribed to Warren De La Rue in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bookbinding
Bookbinding is the process of physically assembling a book of codex format from an ordered stack of ''signatures'', sheets of paper folded together into sections that are bound, along one edge, with a thick needle and strong thread. Cheaper, but less permanent, methods for binding books include loose-leaf rings, individual screw-posts (binding posts), twin loop spine coils, plastic spiral coils, and plastic spine combs. For protection, the bound stack of signatures is wrapped in a flexible cover or is attached to stiffened boards. Finally, an attractive cover is placed onto the boards, which includes the publisher's information, and artistic decorations. The trade of binding books is in two parts; (i) stationery binding (vellum binding) for books intended for handwritten entries, such as accounting ledgers, business journals, blank-page books, and guest logbooks, and notebooks, manifold books, day books, diaries, and portfolios. (ii) letterpress printing and binding deals with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scissors
Scissors are hand-operated shearing tools. A pair of scissors consists of a pair of metal blades pivoted so that the sharpened edges slide against each other when the handles (bows) opposite to the pivot are closed. Scissors are used for cutting various thin materials, such as paper, cardboard, metal foil, cloth, rope, and wire. A large variety of scissors and shears all exist for specialized purposes. Hair-cutting shears and kitchen shears are functionally equivalent to scissors, but the larger implements tend to be called shears. Hair-cutting shears have specific blade angles ideal for cutting hair. Using the incorrect type of scissors to cut hair will result in increased damage or split ends, or both, by breaking the hair. Kitchen shears, also known as kitchen scissors, are intended for cutting and trimming foods such as meats. Inexpensive, mass-produced modern scissors are often designed ergonomically with composite thermoplastic and rubber handles. Terminology The noun ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear Stress
Shear stress, often denoted by (Greek: tau), is the component of stress coplanar with a material cross section. It arises from the shear force, the component of force vector parallel to the material cross section. ''Normal stress'', on the other hand, arises from the force vector component perpendicular to the material cross section on which it acts. General shear stress The formula to calculate average shear stress is force per unit area.: : \tau = , where: : = the shear stress; : = the force applied; : = the cross-sectional area of material with area parallel to the applied force vector. Other forms Wall shear stress Wall shear stress expresses the retarding force (per unit area) from a wall in the layers of a fluid flowing next to the wall. It is defined as: \tau_w:=\mu\left(\frac\right)_ Where \mu is the dynamic viscosity, u the flow velocity and y the distance from the wall. It is used, for example, in the description of arterial blood flow in which case which ther ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear Strength
In engineering, shear strength is the strength of a material or component against the type of yield or structural failure when the material or component fails in shear. A shear load is a force that tends to produce a sliding failure on a material along a plane that is parallel to the direction of the force. When a paper is cut with scissors, the paper fails in shear. In structural and mechanical engineering, the shear strength of a component is important for designing the dimensions and materials to be used for the manufacture or construction of the component (e.g. beams, plates, or bolts). In a reinforced concrete beam, the main purpose of reinforcing bar (rebar) stirrups is to increase the shear strength. Equations For shear stress \tau applies :\tau = \frac , where :\sigma_1 is major principal stress and :\sigma_3 is minor principal stress. In general: ductile materials (e.g. aluminum) fail in shear, whereas brittle materials (e.g. cast iron) fail in tension. See ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penny Magazine
''The Penny Magazine'' was an illustrated British magazine aimed at the working class, published every Saturday from 31 March 1832 to 31 October 1845. Charles Knight created it for the Society for the Diffusion of Useful Knowledge in response to ''Chambers's Edinburgh Journal'', which started two months earlier. Sold for only a penny and illustrated with wood-engravings, it was an expensive enterprise that could only be supported by very large circulation. Though initially very successful—with a circulation of 200,000 in the first year—it proved too dry and too Whiggish to appeal to the working-class audience it needed to be financially viable. Its competitor—which included a weekly short story—grew more slowly, but lasted much longer. Early success During the first few years of publication ''The Penny Magazine'' was highly successful in building an audience selling over 200,000 copies in 1832 with an estimation of nearly one million readers that year and easily outsell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Exhibition
The Great Exhibition of the Works of Industry of All Nations, also known as the Great Exhibition or the Crystal Palace Exhibition (in reference to the temporary The Crystal Palace, structure in which it was held), was an International Exhibition, international exhibition which took place in Hyde Park, London, Hyde Park, London, from 1 May to 15 October, 1851. It was the first in a series of World's fair, World's Fairs, exhibitions of culture and Manufacturing, industry that became popular in the 19th century. The event was organised by Henry Cole and Albert, Prince Consort, Prince Albert, husband of Victoria, Queen of the United Kingdom. Famous people of the time attended the Great Exhibition, including Charles Darwin, Karl Marx, Michael Faraday (who assisted with the planning and judging of exhibits), Samuel Colt, members of the Orléanist, Orléanist Royal Family and the writers Charlotte Brontë, Charles Dickens, Lewis Carroll, George Eliot, Alfred, Lord Tennyson, Alfre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Library
The British Library is the national library of the United Kingdom and is one of the largest libraries in the world. It is estimated to contain between 170 and 200 million items from many countries. As a legal deposit library, the British Library receives copies of all books produced in the United Kingdom and Ireland, including a significant proportion of overseas titles distributed in the UK. The Library is a non-departmental public body sponsored by the Department for Digital, Culture, Media and Sport. The British Library is a major research library, with items in many languages and in many formats, both print and digital: books, manuscripts, journals, newspapers, magazines, sound and music recordings, videos, play-scripts, patents, databases, maps, stamps, prints, drawings. The Library's collections include around 14 million books, along with substantial holdings of manuscripts and items dating as far back as 2000 BC. The library maintains a programme for content acquis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paper Cutter
A paper cutter, also known as a paper guillotine or simply a guillotine, is a tool often found in offices and classrooms, designed to administer straight cuts to single sheets or large stacks of paper at once. History Paper cutters were developed and patented in 1844 by French inventor Guillaume Massiquot. Later, Milton Bradley went on to patent his own version of the paper cutter in 1879. Since the middle of the 19th century, considerable improvements to the paper cutter have been made by Fomm and Krause of Germany, Furnival in England, and Oswego and Seybold in the United States. Description Paper cutters vary in size, usually from about in length on each side for office work to (an edge of A1 paper) in design workshops. The surface will typically have a grid either painted or inscribed on it and may have a ruler across the top. At the very least, it must have a flat edge against which the user may line up the paper at right angles before passing it under the blade. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indiana University
Indiana University (IU) is a system of public universities in the U.S. state of Indiana. Campuses Indiana University has two core campuses, five regional campuses, and two regional centers under the administration of IUPUI. *Indiana University Bloomington (IU Bloomington) is the flagship campus of Indiana University. The Bloomington campus is home to numerous premier Indiana University schools, including the College of Arts and Sciences, the Jacobs School of Music, an extension of the Indiana University School of Medicine, the School of Informatics, Computing, and Engineering, which includes the former School of Library and Information Science (now Department of Library and Information Science), School of Optometry, the O'Neil School of Public and Environmental Affairs, the Maurer School of Law, the School of Education, and the Kelley School of Business. *Indiana University–Purdue University Indianapolis (IUPUI), a partnership between Indiana University and Purdue Universi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Book Arts , the process of creating a book
{{disambiguation ...
Book arts may refer to: * Artist's books, works of art in the form of a book * Book illustration, illustration in a book * Book design, the art of designing a book * Bookbinding Bookbinding is the process of physically assembling a book of codex format from an ordered stack of ''signatures'', sheets of paper folded together into sections that are bound, along one edge, with a thick needle and strong thread. Cheaper, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
