The Amazing Spider-Man Vol. 1 Issue 164

"Deadline!"

The Kingpin has Spider-Man hooked up to a machine with his seemingly dead son, Richard Fisk. The Kingpin explains of his sons "death" during his brief time running a branch of Hydra (and ultimately duped by the Red Skull). He explains that the device he's using -- the Vita-Drain Device -- to drain Spider-Man of his vitality and put it into his comatose son. The process is a success and Richard Fisk is revived, leaving Spider-Man in a severely weakened state and dumped in the streets to die.