US3808971A — Web registration in an intermittantly fed rotary …

Claim 1

Independent Claim 408 words

In a rotary printing press for printing variable length forms of printing material, particularly endless webs of forms having transversely extending lines of perforations, with printing mechanisms including plate cylinders carrying plates extending through part of their circumferential peripheries and effecting intermittent printings of successive forms, a main traction device drawing a web from a supply roll thereof and feeding the web to the printing mechanisms between intermittent successive printings of forms by the latter, the traction device having a web feeding stroke adjustable in accordance with the form length and including a main traction roll means for adjustably rotating said roll intermittently in the direction of movement of the web through a peripheral distance equal to the length of the web feeding stroke and cooperable with pressure rolls to advance the web a distance equal to the length of the web feeding stroke, a reciprocable equalizing carriage between the traction device and the printing mechanisms, having rolls looped by the web, and means for reciprocating the carriage to change the length of the looped web to compensate for the difference between the intermittent advance of the web by the traction device and the intermittent printings of forms by the printing mechanism, and perforating means operable to form lines of perforations extending transversely of the web between adjacent forms: the improvement comprising, in combination, means on the leading and trailing ends of each plate on said plate cylinders operable to print adjusting marks, on the printing material web, at the leading and trailing ends of each form length; scanning means positioned, in the direction of movement of the printing material, directly behind said printing mechanisms and operable to scan said printed adjusting marks to detect any lack of longitudinal coincidence between the mark at the trailing end of each form and the mark at the leading end Of the respective next succeeding form; said means for adjustably rotating said roll including an adjusting motor connected to said main traction device and operable to adjust the web feeding stroke thereof; and control means connecting said scanning means in controlling relation with said adjusting motor to effect operation of said adjusting motor in accordance with the scanned printed adjusting marks to regulate the web feeding stroke of said traction device to maintain coincidence between the printed adjusting mark at the trailing end of each form and the printed adjusting mark at the leading end of the respective next succeeding form.

Claim 2

Dependent Claim 408 words

In a rotary printing press for printing variable length forms of printing material, particularly endless webs of forms having transversely extending lines of perforations, with printing mechanisms including plate cylinders carrying plates extending through part of their circumferential peripheries and effecting intermittent printings of successive forms, a main traction device drawing a web from a supply roll thereof and feeding the web to the printing mechanisms between intermittent successive printings of forms by the latter, the traction device having a web feeding stroke adjustable in accordance with the form length and including a main traction roll means for adjustably rotating said roll intermittently in the direction of movement of the web through a peripheral distance equal to the length of the web feeding stroke and cooperable with pressure rolls to advance the web a distance equal to the length of the web feeding stroke, a reciprocable equalizing carriage between the traction device and the printing mechanisms, having rolls looped by the web, and means for reciprocating the carriage to change the length of the looped web to compensate for the difference between the intermittent advance of the web by the traction device and the intermittent printings of forms by the printing mechanism, and perforating means operable to form lines of perforations extending transversely of the web between adjacent forms: the improvement comprising, in combination, means on the leading and trailing ends of each plate on said plate cylinders operable to print adjusting marks, on the printing material web, at the leading and trailing ends of each form length; scanning means positioned, in the direction of movement of the printing material, directly behind said printing mechanisms and operable to scan said printed adjusting marks to detect any lack of longitudinal coincidence between the mark at the trailing end of each form and the mark at the leading end Of the respective next succeeding form; said means for adjustably rotating said roll including an adjusting motor connected to said main traction device and operable to adjust the web feeding stroke thereof; and control means connecting said scanning means in controlling relation with said adjusting motor to effect operation of said adjusting motor in accordance with the scanned printed adjusting marks to regulate the web feeding stroke of said traction device to maintain coincidence between the printed adjusting mark at the trailing end of each form and the printed adjusting mark at the leading end of the respective next succeeding form.

Claim 3

Dependent Claim 104 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 1, in which said means operable to print said adjusting marks prints adjusting marks which are linear and extend in the same direction, with the adjusting marks on each form arranged in respective planes which are at respective different spacings from an edge of the printing material web and with all of the adjusting marks at the leading ends of the forms being aligned in one of said planes and all of the adjusting marks at the trailing ends of the forms being aligned in the other plane.

Claim 4

Dependent Claim 35 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 1, in which the means operable to print said adjusting marks are arranged on one of said printing plates.

Claim 5

Dependent Claim 65 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 1, including a pair of adjusting rings, means to lock said pair of adjusting rings in a registered position in relation to the form to be printed, at one end of one of said plate cylinders; said means operable to print adjusting marks being arranged on respective adjusting rings.

Claim 6

Dependent Claim 146 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 1, in which said main traction device has an end stop adjustable by said adjusting motor; said adjusting motor comprising a step motor operable to adjust said end stop to the form length; said end stop being arranged on an internally threaded adjusting nut threadedly engaged by an externally threaded fluid pressure cylinder; a plunger secured to a piston engaged in said cylinder; a counter-stop on said plunger engageable with said end stop; a cam having a curvilinear periphery engageable with one end of said plunger; and means continuously driving said cam; said one end of said plunger engaging said cam between the highest point of its curvilinear periphery and the end point of the dropping curve leg of said cam as determined by the adjustment of said end stop.

Claim 7

Dependent Claim 90 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 5, in which the opposite end of said plunger is formed as a rack; a pinion engaged with said rack; gears connecting said pinion with a main traction shaft of said main traction device; a disengageable coupling interposed between said gears and said main traction shaft; and a disengageable brake coupling connected to said main traction shaft; said first-mentioned disengageable coupling and said brake coupling being engaged and disengaged in alternation with each other.

Claim 8

Dependent Claim 30 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 5, including a self-locking worm-worm gear drive connecting said nut with said step motor.

Claim 9

Dependent Claim 39 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 5, including means operable to feed setting values to said step motor to preadjust said end stop to set the initial form length.

Claim 10

Dependent Claim 77 words

In a rotary printing press for variable forms of printing material, as claimed in claim 1, including web length adjusting means between said printing mechanisms and said perforating means operable by said control means, to adjust the length of the web between said printing mechanisms and said perforating means in a direction sucH that said perforating means operates to form a line of perforations extending transversely of the printing material in coincidence with said printed adjusting marks.

Claim 11

Dependent Claim 82 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 1, including a length register guiding said printing material web between said main traction device and said perforating means; and means connecting said length register to said control means and operable to adjust said length register, simultaneously and in synchronism with said main traction device, by the same amount and in the same direction as the web feeding stroke of said main traction device is adjusted.

Claim 12

Dependent Claim 112 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 10, in which said length register includes a second adjusting motor; an electronic control device; first and second additional scanning heads operatively associated with said perforating means; said first scanning head scanning one set of adjusting marks on the printing material; said second scanning head scanning a marking associated with the perforating tool of said perforating means; additional control lines connecting both scanning heads to said second adjusting motor through said electronic control device to regulate the printing material to the coincident position of said printed adjusting marks and said marking associated with said perforating tool.

Claim 13

Dependent Claim 58 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 11, in which said perforating means comprises a perforating device actuated by a bell crank and provided with punching knives; and a rotatable cam disc operable to actuate said bell crank; said cam disc carrying said marking associated with said perforating tool.

Claim 14

Dependent Claim 35 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 12, including an adjusting ring arranged on said cam disc and carrying said marking associated with said perforating tool.

Claim 15

Dependent Claim 54 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 10, in which said perforating means is a rotating perforating device having rolls and knives; said marking associated with the perforating tool being aligned with a perforating knife and arranged on the perforating roll carrying said perforating knife.

Claim 16

Dependent Claim 57 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 14, including an adjusting ring, means to lock said adjusting ring in a registered position in relation to the form to be printed, at an end of said perforating roll; said adjusting ring carrying said marking associated with the perforating tool.

Claim 17

Dependent Claim 33 words

In a rotary printing press for variable length forms of printing material, as claimed in claim 14, in which the edge of a perforating knife constitutes said marking associated with said perforating tool.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-05-06	1977-11-05	1978-05-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-05-06	1981-11-05	1982-05-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-05-06	1985-11-05	1986-05-07	$7700.00	Window Closed / Lapsed

Web registration in an intermittantly fed rotary printing press

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