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Double-sided printing puzzle



 
 
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  #1  
Old February 14th 19, 02:12 PM posted to comp.periphs.printers
David Harper[_2_]
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Posts: 26
Default Double-sided printing puzzle

I have used several different all-in-one printers over the years (mostly
Canon). They all did two-sided printing the same way: print the odd page
numbers first, then ask the user to take those printed pages and turn them
around and put them back in the input paper tray to have the even numbered
pages printed on the back of the odd numbered pages.

My latest, cheap Canon all-in-one printer, MG3600, does it differently in a
way I can't figure out how it does it!

This new printer when printing double-sided will print page one, then pull
the page back into the printer and print page 2 on the back of page one. How
does it do that?

- David Harper

  #2  
Old February 14th 19, 02:52 PM posted to comp.periphs.printers
Bob Eager[_5_]
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Posts: 3
Default Double-sided printing puzzle

On Thu, 14 Feb 2019 08:12:59 -0600, David Harper wrote:

I have used several different all-in-one printers over the years (mostly
Canon). They all did two-sided printing the same way: print the odd page
numbers first, then ask the user to take those printed pages and turn
them around and put them back in the input paper tray to have the even
numbered pages printed on the back of the odd numbered pages.

My latest, cheap Canon all-in-one printer, MG3600, does it differently
in a way I can't figure out how it does it!

This new printer when printing double-sided will print page one, then
pull the page back into the printer and print page 2 on the back of page
one. How does it do that?


Probably in a similar way to the duplexer on my old HP. Suck the page
back in, then run it to a holding area (probably round a roller), then
back into the input area the other way up.
  #3  
Old February 14th 19, 04:37 PM posted to comp.periphs.printers
Percival P. Cassidy
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Posts: 192
Default Double-sided printing puzzle

On 2/14/19 9:12 AM, David Harper wrote:

I have used several different all-in-one printers over the years (mostly
Canon). They all did two-sided printing the same way: print the odd page
numbers first, then ask the user to take those printed pages and turn
them around and put them back in the input paper tray to have the even
numbered pages printed on the back of the odd numbered pages.

My latest, cheap Canon all-in-one printer, MG3600, does it differently
in a way I can't figure out how it does it!

This new printer when printing double-sided will print page one, then
pull the page back into the printer and print page 2 on the back of page
one. How does it do that?


That's how my ancient HP LaserJet 2200D (basically Canon innards, IIRC)
does it. In the case of certain kinds of paper jam, if you pull out the
tray (top tray, if there's more than one) you get access to a catch that
releases a metal tray into which the pulled-back page has been fed
(printed side down), ready to be fed back through the printer (blank
side down) for the second side to be printed.

Mine is rather noisy, with various relays and solenoids doing their
thing to "steer" the paper in the right direction. They may have found a
quieter way by now.

Perce

  #4  
Old February 15th 19, 01:57 AM posted to comp.periphs.printers
Percival P. Cassidy
external usenet poster
 
Posts: 192
Default Double-sided printing puzzle

On 2/14/19 11:37 AM, I wrote:

I have used several different all-in-one printers over the years
(mostly Canon). They all did two-sided printing the same way: print
the odd page numbers first, then ask the user to take those printed
pages and turn them around and put them back in the input paper tray
to have the even numbered pages printed on the back of the odd
numbered pages.

My latest, cheap Canon all-in-one printer, MG3600, does it differently
in a way I can't figure out how it does it!

This new printer when printing double-sided will print page one, then
pull the page back into the printer and print page 2 on the back of
page one. How does it do that?


That's how my ancient HP LaserJet 2200D (basically Canon innards, IIRC)
does it. In the case of certain kinds of paper jam, if you pull out the
tray (top tray, if there's more than one) you get access to a catch that
releases a metal tray into which the pulled-back page has been fed
(printed side down), ready to be fed back through the printer (blank
side down) for the second side to be printed.


Sorry! for "down" read "up."

Mine is rather noisy, with various relays and solenoids doing their
thing to "steer" the paper in the right direction. They may have found a
quieter way by now.



 




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