Print Data Log Generation Before Erasure

Solution Overview

Problem

Existing printing technologies do not generate and store logs for print data that is cancelled, resulting in a lack of record for such data.

Innovation Solution

A printing apparatus and method that includes a control device to detect a cancel instruction, generate a log including information about the cancelled print data, and store this log before erasing the print data, ensuring a record is maintained even after cancellation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of substance

If print data is erased after cancellation to save storage space, then storage efficiency is improved, but log information for cancelled data is lost

Engineering Contradiction:

Improvestorage spaceVSAvoidlog information

Core Design Contradiction:

Loss of substanceVSLoss of information

Solution Approach 1:

The patent extracts only the necessary log information (print data ID, cancellation timing, cancellation cause) from the complete print data, storing only this extracted information in the log. This allows the system to maintain log records for cancelled print data without storing the entire print data content, thus resolving the contradiction between storage efficiency and information preservation.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent generates and stores the log information before erasing the print data. By performing the log generation action preliminarily, before the erasure occurs, the system ensures that log information is preserved even when the original print data is deleted to free storage space.

Inventive Principle:

Principle #10Preliminary action

2Loss of information

If all print data is retained to maintain complete logs, then information completeness is improved, but storage requirements increase

Engineering Contradiction:

Improvelog completenessVSAvoidstorage capacity

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential log information (print data ID, cancellation timing, cancellation cause) from the complete print data, storing only this extracted information in the log. This allows the system to maintain log records for cancelled print data without storing the entire print data content, thus resolving the contradiction between storage efficiency and information preservation.

Inventive Principle:

Principle #2Taking out (Extraction)

3Productivity

If print data is erased upon cancellation to improve storage efficiency, then storage management is improved, but traceability of cancelled prints is worsened

Engineering Contradiction:

Improvestorage management efficiencyVSAvoidtraceability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent generates and stores the log information before erasing the print data. By performing the log generation action preliminarily, before the erasure occurs, the system ensures that log information is preserved even when the original print data is deleted to free storage space.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts only the necessary log information (print data ID, cancellation timing, cancellation cause) from the complete print data, storing only this extracted information in the log. This allows the system to maintain log records for cancelled print data without storing the entire print data content, thus resolving the contradiction between storage efficiency and information preservation.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS8988719B2Printing apparatus and log recording method

Publication Date: 2015.03.24 BROTHER KOGYO KK

AI summary

A printing apparatus including: a storage unit configured to store print data a printing unit configured to print the print data; and a control device configured to: erase the print data from the storage unit, when a cancel instruction to cancel printing of the print data stored in the storage unit is detected; generate a log before erasing the print data, the generated log including a first log related to erasing target data which is a portion of the print data to be erased; and store the generated log in a storage device.