Paper and Pulp Industry

From the beginning, RYECO has been introducing products specifically designed to address the needs of customers in the paper and pulp industry, as well as downstream converters.  Ultimately, RYECO's products and services are used to increase product quality before it reaches the end customer.  In 1989, this started with the introduction of Edge Crack Detection Systems to identify and mark separated and unseparated edge cracks.  Today, in addition to Edge Crack Detection Systems, Ryeco has numerous Marking and Reading, and Sheet Break Detection Systems to meet nearly any customer's needs in the Paper and Pulp industry. 

Explore below to learn about how RYECO's Marking and Reading Systems, Sheet Break Detection Systems and Edge Crack Detection Systems are being utilized by manufacturers in the Paper and Pulp industry.  Ultimately, RYECO's products help customers increase product quality, improve and refine manufacturing processes, reduce unscheduled down-time and increase operating profits. 

Marking and Reading Systems  -  Sheet Break Detection Systems  -  Edge Crack Detection Systems 

Marking and Reading Systems

Defect Marking

Defect marking is the simplest and most basic of the marking methods.  A dye mark is placed at each defect location that will require further action in a downstream process.  In Edge Marking applications, the mark is made along the edge of the material and is visible from the end of a completed roll, while lane markers give the flexibility to make marks at any location on the width of the web.

The length and appearance of the dye mark is adjustable according to individual customers' needs.  Multiple dye types are available for marking on both coated and uncoated paper and dyes come in multiple colors, including invisible UV dye.  Depending on individual needs, markers can be placed precisely at the defect or can be placed at a desired distance away from the defect to create a warning of approaching defects for downstream users.  Marks can be human-visible or machine-detectable using RYECO's line of Mark Sensors.

Code Marking and Reading

RYECO also manufactures various Ultra High Speed Code Markers that receive direct control from a customer's quality/process control equipment, such as a web inspection system.  Instead of making defect marks at each defect location, RYECO's system is used to make a lineal code mark on the web.  RYECO's system does not generate the code, nor does it decode the marks; the code simply "passes through" RYECO's system to the marker, where the code is marked on the web.  The quality/process control equipment must send the marker digital pulses that determine the length and frequency of each individual mark in the code mark.  Typically, code marks are used to denote distance on a roll (footage, yardage, meters, etc.), though coded marks can be made for any other code that is required and are commonly adapted to individual customers' needs.

In addition to Code Marking, RYECO's Mark Readers detect the lineal code marks and send a pulse string to a customer's unwind control system.  In this manner, the unwind control system will be automatically stopped during the unwind process when there is defective or off-spec. material present.  RYECO offers a full line of Mark Reading and Mark Verification products to allow cutomers to mark and track defects throughout production and processing.

Explore Marking and Reading options in the Product Catalog

Applications

• Mark defects on the paper edge when they are identified by a web inspection system
• Mark a footage code along the sheet edge as defined by a WIS 
• Mark paper that is off-spec
• Mark splices for an off-machine coater, winder or re-reeler 
• Mark the paper edge to identify startup paper
• When used with a Reader, mark defects for automatic stopping on a winder 
• Re-Mark sets with defects on a winder
• Re-Mark defects on a re-reeler after trimming 
• Mark grade changes during paper manufacturing 
• Mark sheets to indicate count.  For example, mark every 100th sheet in a stack
• Mark cut lines to retain stack count marks after cutting in a guillotine 
• Mark paper to indicate the coated or uncoated side of the material
• Mark coating skips during a coating operation 
• Mark delamination on a laminator

Sheet Break Detection Systems

System Operation

RYECO offers a full line of Sheet Break Detection Systems that are specifically designed for the harsh environment of a paper mill.  All systems have a small footprint and most can expand from one or two sensors up to twelve depending on individual needs.

In many cases, RYECO's Sheet Break Detection Systems interface with the customer's own process control equipment, though the systems are also designed to operate as stand-alone systems.  RYECO's systems provide a "Sheet On" output when the sheet is detected; when a sheet break occurs, the system generates and outputs a "Sheet Break" signal to the customer's equipment for further processing.  In the event that this isn't possible, RYECO also has systems with integrated PLCs that can provided signal processing prior to output. 

Sensors

Sensor installation location and size/space limitations are important factors to consider when deciding which Sheet Break Detection System will work best with your manufacturing process.  RYECO has systems designed specifically for use in both open-draw and sheet-on-fabric/felt applications.  In addition, there are numerous sensor options, allowing for sensor installation as close as 8" or as far as 60" from the sheet.  

Because of RYECO's patented air-purge technology, all Sheet Break sensors are designed to reliably operate in the high heat and humidity of a dryer hood, as well as areas with high levels of debris, such as a size press or coater.  

Explore Sheet Break Detection options in the Product Catalog

Applications

• Detect sheet breaks in open-draw applications 
• Detect sheet breaks in sheet-on-fabric/felt applications 

Edge Crack Detection Systems

Edge cracks can be a chronic problem for some manufacturers, resulting in defective product and lost profits and production time.  RYECO's Edge Crack Detection Systems detect paper edge defects such as cracks, tears, wrinkles and folds by using patented air jet technology in conjunction with optical sensors.  In addition, Edge Crack Detection Systems are commonly paired with RYECO's Edge Marking, such as in the standard System I and System II configurations, to allow customers to detect edge defects and then mark them accordingly for tracking and later removal.