The man then bound the woman's head and hands, then proceeded to sexually assault her, police said.
He also stole $210 and a bank card.
The suspect is described as a black man in his late 20s to early 30s. He is about 5'10" tall, weighing around 150 pounds with a medium build and a thin beard.
He was also armed with a black butcher's knife.
Anyone with information is asked to call police at 215-685-3263
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