Well first off, you posted the same message to three different threads, second your question is about HP iPrint Photo, not AirPrint, which is what these forums are for supporting. HP does have its own forums, and there is even one where questions like this are answered.
That being said, here is how you can get to the scans you have done.
1) Connect your iPad to your Mac/PC, open iTunes, click on the Apps tab, and scroll down to the File Sharing section. Now select HP iPrint, and you will see two folders, Documents and Images. Select the folder it is saved in a select Save to... This will allow you to save the file somewhere on your computer and you can do with it as you please.
2) On your iPad, open HP iPrint, and select the Saved Files at the top. If your scan is saved as an image, select the Images folder then click on your image. At the bottom, click the Move button, and select Photo Album. You scan will now be in your library and you can include it easily from an email on your iPad.
3) On your iPad, open HP iPrint and select saved files at the top. Select your the folder where your file is saved and turn on Sharing. This will let you connect to the App remotely to grab the file you want to load. You can then do with it as you please.
These are the three options you have for saving a Scanned file after you have it inside of HP iPrint Photo.
Just trying to help.
Andrew