A method for measuring substrate bending stiffness and thereby basis weight on a real time basis. Provided is a corrugator having a plurality of parallel ribs, with one or more sheets of the substrate provided below the corrugator wherein a predetermined gap exists between a topmost sheet of the sheets and the corrugator. A vacuum is applied between the corrugator and the topmost sheet, wherein the vacuum is sufficiently large to raise the topmost sheet, thereby deflecting and bending it into a ...

A method and a device for separating flat, sheet-like elements from a stack of such elements, in particular, from a stack of unexposed printing plates that will be automatically loaded into a printing plate recorder. When the upper or front element in the stack is being separated from the stack, an edge area of this element is curved up in some way.

This invention relates to the composition of an emulsion and a method of producing a stable, wax semi-solid by aeration of the emulsion. The emulsion contains wax, water, a primary mono or secondary dialkanolamine, and an aliphatic monocarboxylic acid in the proportions of about 25 to 75 weight percent water, about 20 to 65 weight percent of a normally solid hydrocarbon wax, about 1 to 15 weight percent of the alkanolamine, and about 3.5 to 15 weight percent of the acid. The aeration can be acco...

A method for making hydrophobic sand including coating sand with a wax blend so as to form a coated sand with advanced hydrophobic properties, wherein a weight ratio of the wax blend to total coated sand weight is about 0.05% 10%, and the wax blend includes a weight ratio of about 50.01% to 99.99% of a main wax, and about 49.99% to 0.01% of a secondary wax.

The invention concerns a method for unstacking sheets stacked in a feeder, comprising a step which consists in bringing a vacuum cup close to the surface of the sheet at the top of the stack; a step which consists in contacting the vacuum cup with the surface of said top sheet and a step in bringing the vacuum cup away after seizing the top sheet. The invention is characterized in that the vacuum cup is applied in an off-center zone of the top sheet, and said vacuum cup is inclined, when it star...

A sheet pickup assembly has hold-down fingers associated therewith which remain in a stationary condition to press lightly against a stack of sheet stock directly behind the vacuum suckers of the assembly during attachment of the suckers to the top sheet in the stack and retraction of the suckers away from the stack. The simultaneous upward sucker retraction and stationary finger pressure forces the top sheet to flex, such that the next sheet therebelow is prevented from adhering to the top shee...

The subject invention pertains to a continuous process for the production of aqueous paraffin emulsions. A primary emulsion is first formed by subjecting water and paraffin in admixture with an emulsifier and a portion of recycled primary emulsion to heat and turbulent flow. The stability of the primary emulsion is then improved by mixing said primary emulsion with another emulsifier and a portion of a recycled secondary emulsion and subjecting the mixture to heat and turbulent flow to produce s...

A sheet feeding apparatus has a pair of suction cups for attracting an uppermost one of stacked sheets, the suction cups being spaced from each other in a direction across the direction in which the sheet attracted by the suction cups is fed, a swinging mechanism for swinging the suction cups toward each other while the suction cups are attracting the sheet, and a flexing mechanism for forcibly flexing a portion of the sheet between the suction cups toward a next one of the stacked sheets when t...

Disclosed is a sheet supplying device having a suction unit unit for sucking a sheet, and a suction unit unit sucker moving device for moving the suction unit unit, the suction unit unit moving device having a diametrically moving mechanism for moving the suction unit unit diametrically of a predetermined rotary shaft, and a circumferentially moving mechanism for moving the suction unit unit circumferentially of the rotary shaft. Also disclosed is an image recording or reading apparatus for reco...

A de-stacking device for a stack of sheet metal blanks having a vertically movable head adapted to engage the top of the stack of blanks and a saw-tooth blade on the head adapted to engage the edge of the topmost blank and upwardly movable for peeling the topmost blank from the stack.