Patent GB-191017897-A (GB)
Title: Improvements in Sheet Delivery Mechanism for Printing Presses.
Inventor: HENDERSON CARL
IPC: B65H29/12
Filed: 1910-07-27
Granted: 1911-05-04
Abstract: 17,897. Henderson, C. July 27. Delivery apparatus.- Relates to improvements in the sheet-delivery mechanism described in Specification 1913/10 and refers chiefly to the means for releasing and arresting the sheets and for adjusting the sheetcarriers to suit different widths of sheets. The invention consists also in the provision of means for changing to a fly delivery. Fig. 2 shows a plan of half the delivery apparatus, with the sheet - carrier device for one edge of the sheet, the other device being similar. Fig. 4 is an inside view of the carrier device. The bars 1<e>, 2<e> carrying the sheet-carrier bands 1, 2 are mounted upon castings 3 slidably mounted upon transverse rack bars 9, 9<a>. The upper bar 1<e> is lifted to release the sheet by means of pivoted arms 1<f> fixed upon shafts 1<a> journaled in bosses 3<a> on the casting 3. One shaft 1<a> carries an arm 1<h> operated by a cam 4<a> on a transverse shaft 4. The lower bar 2<e> is slidably mounted upon brackets 3<b>, and is shifted laterally from under the sheet by bellcrank levers 2<g> having pin-and-slot connexions with the bar 2<e> and connected together by a link 2<j>. A roller 2<k> upon one bell-crank 2<g> engages a race cam 4<b> on the shaft 4. The shaft 4 is operated by means of a crank 4<e> connected to a suitable moving part of the printing-press. The bands 1, 2 are continuously driven by means of a gear-wheel 5<m> slidably keyed to a transverse shaft 5 and connected to the casting 3 so as to move with it. The shaft 5 is operated by gearing from a suitable part of the machine. The sheet-arresting devices are shown in Figs. 4 and 9, and each comprise upper and lower members 8, 7 adapted to engage the margin of the sheet just as the carriers are separated to release the sheet. The upper member 8 consists of a plate pivoted on an arm 8<b> fixed to a spindle 8<c> which carries a bell-crank 8<d>, one arm of which is provided with a pin 8<e>, Fig. 9, which underlies the flanged edge of the bar 1<e>, so that, when the bar is in its normal lowered position, the member 8 is raised clear of the sheet S The other arm of the bell-crank is pressed downwards by a spring 8<f>. The lower member 7 is mounted upon a spring arm 7<a>, which rests upor the bar 2e and is normally forced inwards by a spring 7<e> so that the member 7 lies beneath the upper member 8. The sheet-arresting device: are carried by a bracket 7<c> adjustably mountec upon the casting 3, so that the members 7, 8 may grip the sheet at any point of its length When the sheet reaches its point of delivery the upper bar 1<e> is raised and the upper arrest ing-member 8 is depressed by the spring 8<f> so as to press the sheet on to the lower member 7 and arrest its travel. The bar 2<e> is then moved outwardly until it passes a bend 7<g> in the spring arm 7<a>, thereby allowing the member 7 to drop and release the sheet. The member 7 is ther withdrawn from beneath the sheet by contact of the bar 2<e> with a stop 7<h> on the arm 7<a> Depending fingers 2<p> guide the sheet when fall. ing. The castings 3 are adjusted transversely of the machine to suit different widths of sheets by means of pinions 6<a>, 6<f>, Fig. 4, gearing with the racks on the bars 9<a>, 9 respectively. The pinion 6<a> is carried by a shaft 6 which is geared to the spindle carrying the pinion 6<f> and is operated by a wrench applied to its squared end 6<b>. Disengagement of the casting 3 from the bar 9<a> is prevented by a lip 3<e> and retaining- plate 3<f>. In order to change to a fly delivery to deliver the sheets printed side down, the castings 3 are shifted to their outermost positions so that pins 3
, Fig. 2, on the castings enter holes f in the frames F and the pinions 6<a> engage short rack-plates 6<m>. The bar 9<a> is then removed by loosening the nuts 9<c>, recesses 9<f> in the bar allowing the passage of the retaining- plates 3<f>. The pins 3
 are automatically locked in the holes f, when the bar 9<a> is removed, by means of spring-controlled levers 3<t>, Fig. 13, on the frames F engaging notches in the pins and projecting through slots in the rack plates 6<m>. An ordinary fly - frame can then. be inserted between shouldered stub shafts 10, Fig. 2, the ends of the fly-shaft being correspondingly shouldered and locked to the stub shafts by adjustable sleeves 10<b>. The fly is operated by a rack-and-segment gear 10<n>, 10m connected by a rod 10<p> to a suitable moving part of the machine.