Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Transport control method, a transport apparatus, and a printing apparatus

a technology of transport control and printing apparatus, applied in the directions of transportation and packaging, thin material handling, web handling, etc., can solve the problem of large control amount, and achieve the effect of small control amount, small gain, and small sensitivity

Inactive Publication Date: 2018-09-27
DAINIPPON SCREEN MTG CO LTD
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a transport control method that reduces irregularities in transport and tension variations during acceleration and deceleration. It achieves this by adjusting the control amount based on the stability of tension control. By doing so, the control amount is increased to inhibit tension variations during acceleration and deceleration, and the control sensitivity is reduced during stable tension control. This results in improved printing quality and reduced transport irregularities.

Problems solved by technology

As a result, when tension control is unstable as at the time of acceleration, for example, the control amount becomes large.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Transport control method, a transport apparatus, and a printing apparatus
  • Transport control method, a transport apparatus, and a printing apparatus
  • Transport control method, a transport apparatus, and a printing apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039]An embodiment of this invention will be described hereinafter with reference to the drawings.

[0040]FIG. 1 is a schematic view showing an entire inkjet printing system having a transport apparatus according to this embodiment.

[0041]An inkjet printing system 1 according to this embodiment includes an inkjet printing apparatus 3, a paper feeder 5 and a takeup roller 7.

[0042]The inkjet printing apparatus 3 performs printing on elongate web paper WP. The paper feeder 5 holds a roll of web paper WP to be rotatable about a horizontal axis, and unwinds the web paper WP from the roll of web paper WP to feed it to the inkjet printing apparatus 3. The takeup roller 7 winds up the web paper WP printed by the inkjet printing apparatus 3 about a horizontal axis. Regarding the side from which the web paper WP is fed as upstream and the side to which the web paper WP is discharged as downstream, the paper feeder 5 is disposed upstream of the inkjet printing apparatus 3 while the takeup roller...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensionaaaaaaaaaa
stability timeaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

A transport control method for use in transporting a medium in a predetermined direction by an upstream drive roller and a downstream drive roller, to operate the downstream drive roller by using PID control based on a detection value of a tension sensor disposed downstream of the upstream drive roller and upstream of the downstream drive roller for detecting tension. The transport control method includes a stable state determining step for determining, at time of the operation, whether a difference between the detection value of the tension sensors and a target value is within a stable width to make a stable state which maintains a stability time; and a gain decreasing step for decreasing a gain of the PID control to be less than an initial value when the difference is determined to be in the stable state.

Description

BACKGROUND OF THE INVENTION(1) Field of the Invention[0001]This invention relates to a transport control method, a transport apparatus, and a printing apparatus for transporting an elongate printing medium in a predetermined direction.(2) Description of the Related Art[0002]Conventionally, a printing apparatus having this type of transport apparatus includes a paper feeder, a printing station, a takeup roller and the transport apparatus (see Japanese Unexamined Patent Publication No. 2014-24266 (FIG. 1), for example).[0003]The above transport apparatus includes a first drive roller, a second drive roller, a third drive roller, and a fourth drive roller. The first drive roller is disposed downstream of the paper feeder, which supplies elongate printing paper, and has a nip roller for feeding the printing paper from the paper feeder. The second drive roller has a nip roller for feeding the printing paper sent by the first drive roller into a printing area directly under the printing s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): B65H23/18B65H20/02
CPCB65H23/1806B65H20/02B65H2801/21B65H2301/4165B65H2515/31B65H2801/12B65H23/188B65H2801/06B65H2557/2644B65H23/044
Inventor KAKIMOTO, SHOJIMORIZONO, OSAMU
Owner DAINIPPON SCREEN MTG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com