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Browse Prior Art Database

Variable Speed Document Insertion Device

IP.com Disclosure Number: IPCOM000080741D
Original Publication Date: 1974-Feb-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 8 page(s) / 123K

Publishing Venue

IBM

Related People

Ross, CO: AUTHOR

Abstract

In certain document handling systems, it is necessary to insert documents into pockets or compartments which are moving with a constant velocity at right angles to the documents which are to be inserted. It is necessary to accelerate the document above the intermediate transport velocity to prevent its being overrun by the next document during insertion, insert any document into the compartment and then slow each to a velocity that assures complete insertion, while preventing the damage or significant bounce-back of the.document when it is stopped by an energy-absorbing plate. This system uses a low inertia DC motor (commonly called PCM or printed-circuit motor) to drive the insertion rolls.

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Variable Speed Document Insertion Device

In certain document handling systems, it is necessary to insert documents into pockets or compartments which are moving with a constant velocity at right angles to the documents which are to be inserted. It is necessary to accelerate the document above the intermediate transport velocity to prevent its being overrun by the next document during insertion, insert any document into the compartment and then slow each to a velocity that assures complete insertion, while preventing the damage or significant bounce-back of the.document when it is stopped by an energy-absorbing plate. This system uses a low inertia DC motor (commonly called PCM or printed-circuit motor) to drive the insertion rolls. Document length and position information is obtained by standard photosensing means, and is used to predetermine the velocity profile of a document so the insertion requirements are met.

Fig. 1 is a schematic representation of the intermediate transport, the insertion device, the compartments and energy absorbing plate. The intermediate transport (not shown) feeds individual documents 6 along a straight path 5 at a constant velocity, in the direction 7 shown. Lamps 1 and 2 provide light 20 that will fall on photodetectors 3 and 4, except as a document 6 passes between the lamps and photodetectors. The insertion roll 8 is driven by the PCM 12 through a drive ratio element 11 which establishes a desired fixed velocity ratio between the PCM and the insertion roll, to aid in the mechanical design and/or to optimize the relative velocities for most efficient PCM operation. It is understood the ratio may be 1:1 so that the element 11 would not be present in that case. Idler roll 9 is operated against roll 8 by spring 10 such that documents of the required thicknesses may pass between them. The pressure applied by spring 10 is such that, with the coefficient of friction between the rolls 8 and 9 and any document 6 and 22 and the accelerate/decelerate forces required to effect the insertion control, document slippage will not occur.

There is a multiplicity of compartment dividers 16, 17 and 18 traveling in direction 19 at a constant velocity, such that one compartment space passes the document insertion line 5 each time a document is nominally available to be inserted in the compartment. Document 22 is shown being inserted between dividers 16 and 17, such that (a) its leading edge 23 will not reach the compartment transport line 25 prior to the time the end 24 of divider 16 has progressed beyond insertion line 5, (b) its trailing edge 26 will have left the rolls 8 and 9 by the time divider 17 has reached the insertion line 5, (c) its velocity has been reduced so that it will not bounce back from or be damaged by impacting the energy absorbing plate 21, and (d) the leading edge 27 of document 6 will not impact the trailing edge 26 of document 22. Document 22 will be carried in the direction 19 by divider 17 prio...