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Nip Impressions® is Paperitalo Publications' flagship publication.  Published every Thursday afternoon (US Eastern Time), Nip Impressions® is eagerly read by pulp and paper professionals around the world.

12 Feb 14: Computerization 2: Google Glass


It was announced last week that Apps are being developed for Google Glass that will allow facial recognition, backed up with a complete dossier on the person whose face is recognized.  This got us to thinking that such an App is not far from something that would be useful in the pulp and paper industry.

For instance, what if, using Google Glass and an appropriate App, you could detect desirable and undesirable traits on a decker or thickener mat?  What if you could walk up on the Fourdrinier wearing Google Glass (with a back of the head strap, don't want it falling off!) and scan the surface for attributes?  Likewise, could backtenders and winder operators see things with Google Glass that they cannot see now?  

It just seems to be a matter of resolution and software, doesn't it?


Any comments?  Let us know by sending an email to jthompson@taii.com with "LGMI Frontiers" in the subject line.

The old topic of fabric press hoods brought out the commentors last week:




Fabric hoods should be a very workable alternative.  The idea of a rapid roll-up system like has been used for weather enclosures in such things as rail car unloading facilities should be very applicable.  If damaged, replacement could be quick and cheap.


Taken to the extreme, what about a 2-layer hood fabric designed to be inflated to come to the proper shape for the hood and to give clearance to the machine.  Framing needed for support would be minimal, needing only to support the weight of the fabric when the inflation air is removed so the hood could be folded to provide total access to a section of the machine.  The roof over the Hubert Humphrey Dome is an example of this kind of system.  There are several more of these systems used as football practice field covers and such.


Good idea.


Ed Turner

Camden, North Carolina






The main issue I would have with fabric hoods would be insulation value and whether we would need to increase hood exhaust flows to prevent sweating and condensation within the hood. A good closed, insulated hood requires much less air flow than an open hood. I'm afraid a fabric hood would head us back in the other direction.


Best regards,


Jeff Reese

International Paper

Loveland, Ohio



 Jim, while modern fabrics can support the transmission of air, e.g., flexible fabric duct sections, they cannot readily "hold" the water or heat that is released in the drying process. The cheap tarps (and even expensive ones) degrade over time and must be periodically replaced. After several replacements, most folk realize that they should have made the proper investment investment in a false ceiling (or better yet revisited their showering process and put in an effective mist collection system) as the labor to replace the tarp and the associated aggravation far exceed one time investment. The hood is only one component of an effective dryer section ventilation system. Remember that on a mass basis the amount of air required for making paper exponentially exceeds the amount of water or fiber. Better make good decisions so you can control the cost of removing and/or heating that air. 

Another thought...tarps have their good uses but you wouldn't use one for storing your hot rod or pleasure boat that you invested plenty of your hard-earned money on would you?

Mark Harrison
Application Specialist at Metso Paper


Well Jim, it is an interesting question but there are many answers to it. Like you say it can be done temporarily. However there are many instances when you have to "climb" on hoods, tighten the hoods for airflows, minimize the heat losses and these restrictions demands more robust light weight materials. Then to use some more robust light weight materials of modern materials are also doable but also needs to be cost effective if you thin for instance carbon fibre. I will pass your comment internally.

Jorma Järvinen
Managing Director (and General Sales Manager) at Valmet UK Ltd




LGMI Design Practices
As always, your comments will be appreciated.
Think light!


Brian Brogdon, Ph.D.
Executive Director




Jim Thompson

Send us your comments by emailing Brian Brogdon
or Jim Thompson!

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LGMI Weekly Ideas are presented for your consideration and inspiration only.  It is solely your responsibility to check for engineering correctness, applicability, standards, insurance policy and local, national or any other legal compliance required before implementing.  Neither The Light Green Machine (TM) Institute, Paperitalo Publications, Talo Analytic International, Inc., nor any individual associated with these entities accepts any responsibility for your application or compliance issues.

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