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Browse Prior Art Database

Vacuum Document Picker

IP.com Disclosure Number: IPCOM000073837D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Souba, CH: AUTHOR

Abstract

The picking and feeding of documents is commonly performed by a vacuum belt or roll. Many such systems, however, tend to feed documents in an undesirable overlapped condition, since each document is fed as soon as it is exposed to the vacuum picker. This system eliminates the need to separate singly-fed overlapped documents, thus allowing the use of a less complex separator, and reduces the smearing and smudging of printing on the documents.

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Vacuum Document Picker

The picking and feeding of documents is commonly performed by a vacuum belt or roll. Many such systems, however, tend to feed documents in an undesirable overlapped condition, since each document is fed as soon as it is exposed to the vacuum picker. This system eliminates the need to separate singly-fed overlapped documents, thus allowing the use of a less complex separator, and reduces the smearing and smudging of printing on the documents.

Hopper mechanism 10 raises document stack 11 to a preset level, allowing a slight clearance under picker wheel 12. Rotating wheel 12 receives vacuum from source 13 through normally open spool valve 14. The top document seals against vacuum ports 15 of wheel 12 and is fed to take-away roll 16, which has the same peripheral speed as that of wheel 12. As the leading document edge engages ports 17, vacuum from source 18 operates diaphragm valve 19 to close spool valve 14. The loss of vacuum at ports 15 thus prevents wheel 12 from picking another document between the time the top-document leading edge engages roll 16 and the time its trailing edge clears roll 16. At the latter time, when the top document has entered transport 20, valve 19 allows valve 14 to open, and the cycle is repeated. The gap between adjacent documents is determined by the relative locations of the leading edge of stack 11 and take- away roll 16, and by the response time of the picker.

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