Tosfos brings down Rabainu Chananal's answer that since he is standing in one place it is quite diffrent than the case of "stuv" (bench area). If staying in one place makes that it is not a proper akira and hanacha than our first mishnah where he sticks his hand into another reshus, since he is in one reshus he should not be chaiv. Please don't just say one is deorisa and one is derabonim. Please explain who or how you got your answer. Thank you.
Azriel Itzkowitz, Brooklyn, NY
To begin with, Tosfos is not referring to a S'tav, but to a theshhold of a Makom P'tur, where the person takes an object from the Ba'al ha'Bayis across the theshhold and hands it to the Ani in the Reshus ha'Yachid (or vice-versa). Against that, we have the case where someone picks up an object in a Reshus ha'Rabim and transports it four Amos from the right side of his body to his left (see Mesores ha'Shas). And we think that he ought to be Patur because when the object comes level with his body it is as if it had stopped, in which case, when he puts it down a few secons later, he will not have transported it in one go (not because he has remained in one Reshus, as you suggested).
What does this have to do with our Mishnah, where the Ba'al ha'Bayis is Chayav for transporting the loaf from one Reshus to another?
Kol Tuv,
Eliezer Chrysler