You can see photos of some winders here. 
https://www.navy-radio.com/rtty-misc.htm

One side of the reel is removable so that you can remove the roll of tape. Unlike movie film or magnetic tape, rolls of paper tape weren’t permanently stored on reels. 
Nick

On Wed, Mar 23, 2022 at 5:01 PM 1oldlens1 <1oldlens1@ix.netcom.com> wrote:
Are these anything like motion picture or recording tape reels?



Sent from my Galaxy


-------- Original message --------
From: Jim Haynes <jhhaynes@earthlink.net>
Date: 3/23/22 1:48 PM (GMT-08:00)
To: Paul Heller <paul0926@comcast.net>
Cc: steve bennett via GreenKeys <greenkeys@mailman.qth.net>
Subject: Re: [GreenKeys] Why no reels?

There were also some tape winders made by J. H. Bunnell.  The ones I'm
familiar with are small reels, like about 5 inch diameter and powered
by a wind-up spring like a clock spring.  This was probably big enough
to hold a day's production in a smallish Western Union office.

---

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"No it ain't! No it ain't!  But ya gotta know the territory."
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