Print job identification and synchronization between NetWare PSe

Details Print job identification and synchronization between NetWare PSe Print job identification and synchronization between NetWare PSe

1995-10-17

1997-09-02

Mancuso, Joseph

G06F 1500

Patent

active

056640757

ABSTRACT:
A process for enabling a printer to separate print jobs while using a protocol for receiving page description data that does not have an end-of-file indicator defined. It is assumed that the each job received by the printer has a first packet with a size of 1 byte, and a content of one null character, a number of data packets having 512 bytes each, and a last packet having the remainder of the bytes of the job which usually will number between 1 and 512 bytes, exclusive. This process also assumes that the printer can send a status packet back to the originator of the data packets, a print server, verifying the receipt of a packet. The system now can generate a hard stop between jobs by having the printer verify the receipt of the previous packet for every current packet received, resulting in a flow of status packets back to the server that is one packet out of phase. After sending out the last packet of a job, the server will wait until that last packet is verified, before sending out the first packet of the next job. When the printer has waited a predetermined amount of time, it will time out, and verify the last packet received. In addition, the content of each packet is inspected to see if it between 1 and 512 bytes. The system will determine that the end of a job has been reached if the current packet size is between 1 and 512, there is a timeout and the system is in the middle of a print job data transfer, or if a new job is detected in the middle of a job data transfer.

REFERENCES:
patent: 5220674 (1993-06-01), Morgan et al.
patent: 5224095 (1993-06-01), Woest et al.
patent: 5323393 (1994-06-01), Barret et al.
patent: 5528621 (1996-06-01), Heiman et al.
patent: 5548728 (1996-08-01), Dahuni

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