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Remote print system having a plurality of computers which are capable of monitoring and controlling operations of a remote printer

  • US 5,799,206 A
  • Filed: 04/07/1995
  • Issued: 08/25/1998
  • Est. Priority Date: 04/11/1994
  • Status: Expired due to Fees
First Claim
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1. A remote print system comprising:

  • a network;

    a host computer connected to the network; and

    a network printer (NPR) connected to the network;

    wherein the host computer includesan NPR control library serving as an interface to the network printer, the NPR control library providing a plurality of functions and converting the functions to corresponding command messages, andan NPR controlling daemon which controls the network printer in accordance with command messages from the NPR control library;

    wherein the network printer includes an NPR connecting protocol controlling unit which communicates with the NPR controlling daemon through the network in accordance with a printer control protocol so as to control the network printer to perform functions under control of the NPR controlling daemon;

    wherein the command messages from the NPR control library include a command message specifying an amount of data to be transferred from the NPR control library to the NPR controlling daemon;

    wherein when the NPR controlling daemon receives the command message specifying an amount of data to be transferred from the NPR control library to the NPR controlling daemon, the NPR controlling daemon sends a message to the NPR control library indicating whether the NPR controlling daemon can accept the amount of data specified by the command message; and

    wherein when the message sent by the NPR controlling daemon to the NPR control library indicates that the NPR controlling daemon can accept the amount of data specified by the command message,the NPR control library sends the amount of data specified by the command message to the NPR controlling daemon, andthe NPR controlling daemon sends the data to the NPR using an NPR connecting protocol, confirms whether the NPR has received the data normally, and after confirming that the NPR has received the data normally, sends a message to the NPR control library indicating that data transfer has been completed normally.

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