While sheetfed lithographic presses in use in North American printing companies span approximately thirty years in age, each decade has brought incremental changes that speed up job throughput in the pressroom and improve workflow and quality of product. It is generally agreed that sheetfed press equipment made before the mid-1990s was built to last but did not, as a general rule, have many sophisticated automated attachments, plate scanning devices, dynamic sheet detection, or other peripherals built into presses since then. Nor did these pre-mid-1990s presses achieve top press running speeds much beyond 10,000 impressions per hour.
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