Wirecloth opening means: let's say:

1" clear opening: means the clear distance BETWEEN the wires

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30 MESH wirecloth: means 30 opening per linear inch

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FORESHORTENING: When we say material sees a smaller opening than say a 1" clear it means this.

If going over a FLAT SURFACE (zero degree flat horizontal screen)

the piece of stone or rock or sand actually comes up to the opening in the wirecloth, can see the full 1" opening in it and try to pass.

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If going over a 20 degree slope INCLINE screen. IT means the material comes up to the same 1" opening and only sees like a 15/16" opening because of the slope travelling down the deck.

OR, if putting material over the same wirecloth opening of 1" say over a STEEP sloped screener 33-45 degree slope the material will see even a considerably SMALLER OPENING to try and pass.

Hope this helps. ■

Hi Izaharis: If you ask 10 people which is better, you will typically get about 50/50 split and they all are right. Customer have comfort levels with certain devices.

FLAT: I agree with your statement. FOOT TRAVEL on flat screen at zero degrees flat is 45 FPM (feet per minute travel rate)

CIRCLE: FOOT TRAVEL on 20 degree declined screen is 60-75 FPM (feet per minute travel rate) DUE to gravity helping.

People do like flat for efficiency and washing and dewatering and for sure if on a portable application (to go under bridges when on the highways)

IF you have a problem inside a building with low head room, a horizontal will help a lot.

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ECONOMICALLY: I would always buy a inclined screen if applicable and it will do the job because: no timing gears, smaller motors, one shaft vs two, less maintenance and less capital cost to buy. Save......plus minus $20,000 if buying an inclined vs a twin shaft, gear driven FLAT SCREEN. ■

I personally do not know of any, but I am not looking either.

Keep smiling ■