In plain terms
Ricoh placed the IM C4500 (released 2019) in its IM C2000 to C6000 range, as the model that prints 45 pages a minute. Ricoh built the same family at other speeds too: IM C2500 (25), IM C3000 (30), IM C3500 (35) and IM C6000 (60), in pages a minute. According to Ricoh, it needs the optional single pass document feeder to scan at its top speed of 120 images a minute, has room for 1,200 sheets (or 4,700 with extra paper options) and copes with card stock to 300 gsm. The model that came after it is the IM C4510.
Maker's own photo









