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National Fantasy Fan, v. 5, issue 6, September 1946
Page 3
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Size and color depend on the job at hand. Absorbent qualities of the paper are inherent because of its processing (lightly pressed together, not coated, etc.). If a surface is not rapidly absorbent it becomes necessary to keep successive sheets of separated by slipsheeting to prevent the unabsorbed ink from getting on the back of the next sheet. Opacity of a paper is important particularly when it is desirable to print on both sides of the sheet. A weight of 16 pounds (commonly called "Utility Grade") should not be printed on both sides as the printing will show through. 18# is a poor paper for both side work, but as the National Emergency has decreed it a substitute for 20# we will have to use it, altho we don't have to like it. 20# is (normally) the lightest weight that should be used for nice appearing two-sided work. The quality of lying flat, particularly while being fed into the equipment, is very important, as a paper that curls and tends to fold causes many difficulties such as paper manning, crooked printing, creased paper, etc. Yellow "second sheets," commonly called Railroad Manila, is the worst offender when it comes to curling. It is practically impossible to duplicated on both sides of this paper. V. FEEDING MECHANISM: The mechanism for feeding paper to the drum and impression roller varies with the type of equipment. Some must be hand fed a sheet at a time while others have intricate systems of rollers and friction areas that precisely feed a sheet at a time in exactly the manner the equipment is set for. Fundamentally the automatic feed system can beat the illustrated in this manner: An amount of paper is stacked on the side of the equipment on which the drum rotates downward. The stack is held in place by long metal guides on each side of it while on the end of the stack opposite the drum is a back stop clamp against which the paper butts. All three of these guides are adjustable so that the stack may be moved to either side or away from the drum, thus regulating the margin widths (side to side) or spacing the copy on the sheet vertically (moving the back stop.) The side guides are equipped with tension pads (usually sponge rubber). These serve the dual purpose of holding the stack in line and of providing a tension to hold the pile of paper from moving when the feeder arm moves the top sheet into the drum and roller for duplicating. The feeder arm is actuated by a lever arrangement attached to the rotating drum. It swings into place on top of the stack of paper and has an adjustable weight which holds the fingers of the feeder arm down upon the stack of papers in various degrees of pressure. Light weight paper needs less pressure to move a sheet forward off the stack and out from between the tension pads than does the heavier paper. This feeder arm also has an adjustment by which the paper may be fed a little sooner in the cycle of drum rotation or a little later, thus supplementing the adjustment of the back stop. As the drum rotates, the feeder arm drags back and forth across the stack of paper. The back stop prevents the top sheet from being shoved. 3
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Size and color depend on the job at hand. Absorbent qualities of the paper are inherent because of its processing (lightly pressed together, not coated, etc.). If a surface is not rapidly absorbent it becomes necessary to keep successive sheets of separated by slipsheeting to prevent the unabsorbed ink from getting on the back of the next sheet. Opacity of a paper is important particularly when it is desirable to print on both sides of the sheet. A weight of 16 pounds (commonly called "Utility Grade") should not be printed on both sides as the printing will show through. 18# is a poor paper for both side work, but as the National Emergency has decreed it a substitute for 20# we will have to use it, altho we don't have to like it. 20# is (normally) the lightest weight that should be used for nice appearing two-sided work. The quality of lying flat, particularly while being fed into the equipment, is very important, as a paper that curls and tends to fold causes many difficulties such as paper manning, crooked printing, creased paper, etc. Yellow "second sheets," commonly called Railroad Manila, is the worst offender when it comes to curling. It is practically impossible to duplicated on both sides of this paper. V. FEEDING MECHANISM: The mechanism for feeding paper to the drum and impression roller varies with the type of equipment. Some must be hand fed a sheet at a time while others have intricate systems of rollers and friction areas that precisely feed a sheet at a time in exactly the manner the equipment is set for. Fundamentally the automatic feed system can beat the illustrated in this manner: An amount of paper is stacked on the side of the equipment on which the drum rotates downward. The stack is held in place by long metal guides on each side of it while on the end of the stack opposite the drum is a back stop clamp against which the paper butts. All three of these guides are adjustable so that the stack may be moved to either side or away from the drum, thus regulating the margin widths (side to side) or spacing the copy on the sheet vertically (moving the back stop.) The side guides are equipped with tension pads (usually sponge rubber). These serve the dual purpose of holding the stack in line and of providing a tension to hold the pile of paper from moving when the feeder arm moves the top sheet into the drum and roller for duplicating. The feeder arm is actuated by a lever arrangement attached to the rotating drum. It swings into place on top of the stack of paper and has an adjustable weight which holds the fingers of the feeder arm down upon the stack of papers in various degrees of pressure. Light weight paper needs less pressure to move a sheet forward off the stack and out from between the tension pads than does the heavier paper. This feeder arm also has an adjustment by which the paper may be fed a little sooner in the cycle of drum rotation or a little later, thus supplementing the adjustment of the back stop. As the drum rotates, the feeder arm drags back and forth across the stack of paper. The back stop prevents the top sheet from being shoved. 3
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