Sheet separating system, sheet handling system, method for the frictional separation and feeding of sheets

Abstract

A paper separating system, based on the frictional separation and feeding of the uppermost sheet (13) from a stack (14) of sheets of paper and flat substrates over a hurdle (8) using a separating and feeding head (1) and a deflection mechanism (35) for the head (1), the head (1) and the deflection mechanism (35) having, in particular, a roller (7) and a driving means (4, 5, 6) for the roller (7) and a resetting means (10), a means (31, 32, 36, 37, 28, 30, 23, 27, 28) for definitively or temporarily stopping, delaying or slowing down the head (1) being provided in the region of a separating distance (d_v, d₂-d₁) between the hurdle (8) and head (1).

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This case is a national application which claims priority of German Application No. 10 2005 056 634 filed Nov. 25, 2005. [0002] The invention relates to a sheet separating system based on the frictional separation and feeding of the uppermost sheet from a stack of sheets, such as sheets of paper or flat substrates, over a hurdle using a separating and feeding head, a deflection mechanism and a resetting means for the head, a sheet handling system and a method for the frictional separation and feeding of the uppermost sheet from a stack of sheets, such as sheets of paper or flat substrates, over a hurdle with the sheet separating system. [0003] Sheet separating systems of an older type are disclosed, for example, in AT 329 093 or DE 18 00 96. These systems have a lifting mechanism which is moved uniformly and positively, for example by an eccentric disk, and with which a feed slide is moved parallel to a stack of sheets on the uppermost ...

AI Technical Summary

Benefits of technology

[0011] In view of this, the concept of the invention proposes that a sufficient period of time is made available in which, after the separating distance between the head and hurdle has been traversed, the advancing force just exceeds the buckling force to such an extent that only a single sheet can be drawn in. The deflection of the head is preferably definitively or temporarily stopped, delayed or slowed down in the region of the separating distance, in particular compared to a deflection of the head which is usually brought about in a uniform way by driving means and resetting means. This ensures that precisely that period of time in which the advancing force exceeds the buckling force by an amount which is only sufficient to draw in one single sheet is extended in practice. Owing to the extension of the period of time, it becomes possible for the abovementioned magnitude of the advancing force, which exceeds the buckling force, both to act long enough

Problems solved by technology

Such sheet separating systems are based on a concept which entails disadvantages since the separating and feeding force which acts on the uppermost sheet by means of the feed slide with a fixed friction roller is already. independent, owing to the forcibly predefined movement contour, of a resistance of the uppermost sheet, actually opposed to this force, for se

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