GB585791 is is the number of a published patent and is in fact available for inspection and download from the German Patent Office's database DEPATISNET. The following link will take you to it.
https://depatisnet.dpma.de/DepatisNe...B000000585791A
Click on the PDF button at the foot of the page to display the document. At one time you used to be able to download a PDF directly, but now you have to use the PDF DISPLAY button at the foot of the page and then the PRINT option to print to PDF. I have just done this, but the PDF is far too large to post here.