The phrase "band across" is correct and usable in written English.
It means a strip or line that extends across something. Example: The band across the road made it difficult for cars to pass through.
A portrait of Mr. Peres, with a black band across one corner, was in the background.
This virus explodes periodically in a band across Africa, especially during wet seasons.
It is also rendered phonetically in a band across the circle.
The large cup earphones and padded band across the head are comfortable, while they are light for extended wear.
Bosnia's existing banner, unfurled in April 1992 after the old Yugoslavia broke up, consists of six golden fleurs-de-lys with a white diagonal band across them.
Reddish nymphs with a light band across the back emerge from the eggs after one or two weeks and immediately begin to suck the plant's sap.
The most impressive array of pigments is found in mantis shrimps (order Stomatopoda), where there are 12 visual pigments in a special band across the eye.
The coal in the Sambre-Meuse valley occurred in a narrow band across south-central Belgium from the French border through Mons, Charleroi, Namur, and Liège.
Boca went through several jersey styles before settling on its distinctive blue shirt with a single yellow band across the chest in 1913.
The extensions were then glued in a diagonal band across the head, while the rest of the hair was pulled into a small side knot below the ear.
Ms. Kummer's newspaper printed in black and white for a week, with a black band across the upper corner of the front page.
