I could be wrong, and it may be me, but I have found that not all docs opened in Safari will give me the option to "Open In". Some blogs, for example, have good embroidery info but I can't touch them and get the option to "Open In". In that case, I use the app I purchased, Web to PDF. Does the trick very nicely. Creates a PDF of the web page.
You can delete pages that are before or go beyond the info you want from that page and don't want, ie ads and comments that have been posted at the bottom of the web page, you can name the PDF created whatever you want. Afterwards, you can email it, open it in other app (iBooks, GoodReader, Pages, etc), whatever you need to do.
Check the App Store to get info on it. Search of "WEB to PDF". Use this a lot.