On August 3, 1901, Mr. John R. Pulsifer of Rochester New York, and Assignor to the Pulsifer Paper Company of Portland, Maine, received his patent number 929896 A from the U.S. Patent and Trademark Office.
The language in Mr. Pulsifer’s application has all the poetry of his time, and he describes “a machine that in the manipulation of delicate tissues, the separate rolls may be easily removed without liability or injury.” In many ways his patent describes the slitting machines – or slitter rollers – that still operate in mills today.
In the mid-1990s, significant updates to the slitter/roller process were made which warranted a new patent, which was granted to Franklin C. Bradshaw and Terry G. Rutledge in 1995.
Slitting machines have been the only way to convert rolls for more than 100 years, and weather your mill uses Mr. Pulsifer’s process, or that of Messrs. Bradshaw and Rutledge, you may notice that not much has changed recently. Until now.
The trouble with slitter rewinders
Slitter machines are actually fairly amazing inventions and they’ve served the industry well for the last decade or so, but they do have their limitations.
Paper slitters are slow. Even the modern high speed siltters are limited because of the fundamental requirement to unwind then rewind the entire roll of material to get the job done, which is one of their main drawbacks. Big and cumbersome, they operate at a production speed that seems almost prohibitive sometimes. They also cost a lot to operate – ideally multiple operators are needed to make sure the slitter rewinder is operating productively, and the big industrial machines eat a lot of energy costs for your mill.
There are also quality issues that slitter rewinders introduce to paper rolls – from tension inconsistencies to the potential for web breaks, the technology that was once so promising is now showing its age.
An alternative to slitters
If you’ve ever stood in your mill wishing for an alternative to your slitter, we’d like to introduce you to the RollRazor. Designed to be used in cases where a slitter rewinder isn’t the best fit, the RollRazor was built for large production converting, and can cut 300% more paper every operating hour than a slitter rewinder.
The RollRazor requires only one operator, its energy use is a 1000% improvement over the slitter, and RollRazor delivers the lowest cost per converted ton at $10. The RollRazor also maintains the quality of rolls by preserving the original mill wind after cutting. Therefore, it delivers better press registration, fewer web breaks, more consistent sheet orientation and much less slitter dust.
See how the RollRazor operates, and you’ll agree that running a RollRazor in tandem with your traditional slitter rewinder is a great way to boost productivity and efficiency at your mill.
Find out more about how the RollRazor works, or fill out our discovery form to see if a RollRazor is right for your mill.