1) A banker was a covering for a bench [bank] or chair, usually of tapestry, and in many contexts accompanied by a dosser and cushions (note the different spellings of the latter word).
1305 pro baunkers et quissynes, Bolton Priory
1389 a docer & a new bancqwer & ij Cochyns, York
1432 a rede docer with a banquere and all the whisshyns, Scarborough
1565 two benkers stayned with armes xvs, two sewed quyshens of silke xxxs, Temple Newsam. A table covering was a banker cloth: 1581 1 table cloth, 1 benker clothe, Anston.