Search

This paper discusses the decision support system for the chipping unit of a paper plant. The chipping unit consists of six subsystems arranged in series and parallel configurations. The decision support system for the chipping unit was developed with the help of a mathematical formulation based on Markov Birth-Death process using a probabilistic approach. For this purpose, first differential equations were generated. These equations were then solved using normalizing condition so as to determine the steady-state availability of the chipping unit. After that, decision matrices were developed which provide various availability levels for different combinations of failure and repair rates for all subsystems. The model developed helps in the operations and quantitative management of various maintenance decisions and actions. The results of this paper are, therefore, beneficial in deciding the relative repair priorities of the various subsystems of the chipping unit. [ABSTRACT FROM AUTHOR]

This article focuses on the identification of paper cutting knives and paper cutters. Of the numerous problems confronting a large laboratory there will always be certain cases that are highlighted by their interesting background and importance. Paper is cut and trimmed commercially by large guillotine type machines, in which a manual or automatic clamp descends to compress the paper and hold it firm while a long hollow ground blade is brought down at great pressure through the stack of paper. The stroke of the knife has a sideway motion as it descends. Depending upon the type of shear stroke, single or double, the edge of the blade will be either parallel to the table top or higher on one end when it starts through a stack. A rocking motion close to the end of the stroke in a double shear action will bring the blade parallel to the table. This type of shear is more like a pair of scissors. A machine of this sort lends itself to the final process of printing where many duplicate copies of a single design are printed on a single sheet of paper, and many of these sheets piled together can be separated simultaneously. The manner of handling, storing, and mounting the knife may also be a factor in placing defects in the blade. Care must be taken to protect the edge at all times or the quality of the cutting will be lessened and the possibility of identification increased.

A 2-year-old girl sustained severe injury to 2 fingers from a home paper shredder. This case illustrates the risk of injury from paper shredders, which are increasingly common household items. Toddlers are at risk of finger injury and amputation. The US Consumer Product Safety Commission performed an investigation of reported injuries and the characteristics of paper shredders that might have contributed to the injuries, and we summarize their findings. [ABSTRACT FROM AUTHOR]

Simple cutting devices such as used in the printing industry allow precise and fine sectioning of frozen peats and sediments, thus enabling research with high temporal resolution. Large slices are useful in the collection of multiple synchronous subsamples for multidisciplinary research. This article describes the apparatus (called DAMOCLES) and its operation, and presents some examples from practice. These include combined microfossil, macrofossil and chemical analyses of the same sample with a sample resolution of 0.5 cm (temporal resolution c. 1 year): rapid changes occur that would have remained unnoticed with a coarser sampling distance. The final example presents a sample resolution of only 0.5 mm. These examples illustrate the possible uses of the DAMOCLES apparatus in palaeoecological research. [ABSTRACT FROM AUTHOR]

This article describes a novel indexing mechanism to improve the productivity of the paper cutting machines. The mechanism is based on dual light sources and an optical detector. [ABSTRACT FROM AUTHOR]

The article presents information the Remington Rand Photoclerk paper cutter acquired by the Queens Borough Public Library to simplify clerical tasks. The Queens model is built around a Nikor Safety Trimmer, to reduce the hazards Involved. The Safety Trimmer is placed on a plywood box with the film holder on the left and a paper stop on the right. It will accommodate a full roll of developed sensitized paper and provides for fairly accurate cut-off with a receptacle for the cut slips.

The article reports that the Montalvo Corp.'s web control systems and products such as the retrofit consisting of T-Series load cells, V-510 brakes, and X-3000 series tension controllers had enabled a customer to achieve eight-pocket sheeter of 399 pounds daily.