Every other page is blank

Hello!
An automatic document feeder or ADF is a feature which takes several pages and feeds the paper one page at a time into a scanner or copier, allowing the user to scan, and thereby copy, print, or fax, multiple-page documents without having to manually replace each page.

we have OKI microline 280 elite , 9 pin printer, it's print blank why
?

Check your flat bed and Document feeder scanning glass need to be clean, if any dot or dust in scanning glass of document feeder it will appear a line, check this points first
1- Check printouts from computer or FAX if it is clean problem in scanning section
2- Check using Copying a blank paper using only Flatbed if it prints without any line its problem from document feeder Scanning glass
So solution is clean the Document feeder scanning glass using wet cloth, note careful about wet cloth switch off the machine and clean it

apparently there is actually no solution... its the way ur document is designed. if ur using a toner try reseting it but that shouldnt help much.

The most common cause of blank (void) lines on a scanned document is from whiteout on the glass where the page is scanned when using the document feeder.
If there is a clear mylar sheet on the bottom of the document feeder, the whiteout may be there instead.

If there was dirt or a dark smudge on the glass (or mylar), it would show up as a black line, but whiteout is white, and shows up as a void (blank) line.

Try Removing the printhead of your printer and putit back, and do the clean nozzles and printhead alignment.

Well, if both feeder and pattern glass also having line on print, suspect hardwares problem...
U can check below items:

1. drum
2. laser unit
3. fuser unit

There you go. Good luck!

HI there make sure that the paper tray guides are fully against the paper also try sending the job through the manual feed to see if you get the same problem. If you do not then it maybe that the paper cassette separation pad is worn and will need replacing. If your model has no rubber pad at the front of the cassette then you will have a metal hold over one corner of the paper make sure that when the paper lifts that the paper sits under the silver (Dog Ear) as this acts as a separator.

Hope this helps
Thanks J

What do you mean scan? Is it from the printer to the computer? Or just plain copy? When you want to scan to the computer, you need a software that can scan multiple pages. HP's document feeder can copy and fax multiple pages, so if the software supports multiple pages scanning, then I'm sure it can.