[PLUG] Awk script syntax help

[Rich Shepard]

Using gawk I want to print all lines in a file except those that have any of
three patterns in field 7. I thought I had the proper syntax but gawk
disagrees and I'm not finding the proper syntax in my awk books or in web
searches. I've tried using if-else (my first choice), as well as negating
the patterns but everything's failed.

Here's the script, drop-1200C.awk:
8< -----
BEGIN { FS=OFS="," }
{ if (/$7 ~ "Gen12c"/ || /$7 ~ "Gen12c(Agent)"/ || /$7 ~ "Gen12u"/)
     { next }
    else
    { print $0 > "processed.dat" }
} 
-------- >8

And here's a sample input file, sample.dat:
8<---------------
'123095','2842','20/10 Products Inc.','20/10 Products','Salem','Marion','Gen12z'
'111677','5015','205 Auto Salvage Inc.','205 Auto Salvage Inc.','Portland','Multnomah','Gen12z'
'108572','1442','4-R Equipment LLC','4-R Equipment LLC','Philomath','Benton','Gen12a'
'111223','2493','48th St LLC','48th St LLC','Springfield','Lane','Gen12z'
'102952','1442','Abadaba Inc','Riverbend Materials-Esg South Pit','Eugene','Lane','Gen12a'
'70200','1541','Age, Frank','New Plant Site','Brownsville','Linn','Gen12c'
'105395','2813','Airgas USA LLC','Airgas USA LLC','Mcminnville','Yamhill','Gen12z'
'126624','4925','Airgas USA LLC','Airgas','Portland','Multnomah','Gen12z'
'125593','1521','Akins',' Clyde','Lilybrook Subdivision','Medford','Jackson','Gen12c'
'100520','2851','Akzo Coatings Inc','Akzo Coatings Inc','Salem','Marion','Gen12z'
'124676','1522','Amberglen Development LLC','Amberglen On The Park','Hillsboro','Washington','Gen12c(Agent)'
'125887','1522','Amberglen South Development Company LLC','Amberglen South Apartments','Hillsboro','Washington','Gen12c(Agent)'
'126441','1623','Antelope, City Of ','Water Transmission',' Storage & Distribution Improvements Project','Antelope','Wasco','Gen12c'
'119429','9511','Lake Oswego, City Of','City Of Lake Oswego','Lake Oswego','Clackamas','Gen12u'
'125935','1611','Lake Oswego, City Of','Boones Ferry Road Project-Phase 1','Lake Oswego','Clackamas','Gen12c'
'118763','3599','Apex Machinery Inc.','Apex Machinery','Eugene','Lane','Gen12z'
---------->8

When I run all versions of awk scripts either all lines are output or I get
doubled lines.

What have I missed in writing the gawk script?

Rich