Patent GB-240210-A (GB)
Title: Improvements in gumming and creasing mechanisms
IPC: B31B50/62
Filed: 1924-06-18
Abstract: 240,210. Mond, A., (Smithe Machine Co., Inc., F. L.). June 28, 1924. Coating-machines.-A, high speed machine for gumming and creasing articles such as envelope-flaps, comprises a roller having a gumming segment 14 normally held towards the axis 16 of the roller 20, but which is released to move away from the axis to a gumming position, when an article engages a feeler finger 35. The segment 14 is gummed by a roller 10, which is normally in engagement with a roller 7 rotating in a reservoir 6, but which is oscillated into contact with segment 14 by a cam 15 on shaft 16 and a pull spring 18 as shown in Fig. 3. The segment 14 is adjustably mounted on plate 19, Fig. 1, which is connected by links 26 with arms 24, mounted on a rock-shaft. 23, and is urged by springs 22 away from the axis 16. The rock-shaft 23 carries a toe 28 engaging a trigger 29 fixtd to a rook-shaft 30. Once in every revolution of roller 20 the toe 28 is lifted out of engagement with the trigger 29 by a cam 31, Fig. 2, engaging a roller 32 carried by an arm 33 fixed to shaft 23. The feeler finger 35, provided with a work engaging portion 35a, is connected to the shaft 30, which is carried by link 38 in loose bearings 36, and is normally pressed by the toe 28 and trigger 29 against the right hand side of said bearings. When the toe 28 is lifted, weak springs 42 pull the arms 38 against stop pins 43 and the shaft 30 is moved to the middle of its bearings, when slight pressure on the finger 35 rotates it and swings the trigger 29 downwardly from behind toe 28, Fig. 1. Roller 50, spaced slightly apart from roller 20 comprises one or more segments 46, pivoted at 47 and urged outwardly by springs 48. On roller 20 a creaser blade 53 is circumferentially yieldably mounted, and is received by a pocket in roller 50 situated between abutment 54 and swing- ing clamp bar 55. The bar 55 is fixed in a shaft 56 and is moved towards abutment 54 at suitable times by means of a cam 57 as shown in Fig. 2, to squeeze a sheet &c. inserted by the blade 53. When an envelope is fed to the machine, it engages the feeler finger 35, which releases the trigger 29 from the toe 28 when the toe is lifted, which in turn allows the springs 22 to force the gumming segment 14 outwards and so gum the envelope flap. When the envelope passes out of engagement with the finger 35, spring 74 will pull trigger 29 against the end of toe 28 where it will rest until toe 28 is swung away by the action of cam 31 sufficiently to permit its entrance behind said toe. Immediately before the gumming operation the creaser blade 53 will force the envelope into the pocket in roller 50, and the bar 55 will set the crease by pressure against the abutment 54. In the absence of an article between the rollers 20, 50, the finger 35 will not be operated, and the segment 14 will remain in its retracted position, where it will not receive or apply gum &c. The segment 46 of the roller 50 will moveover remain in its outward position shown in dotted lines in Fig. 1. In a modification shown in Fig. 5, the creaser blade 76 is pivoted in the free ends of arms 78 mounted on a rock-shaft 79, so as to be retracted below the periphery of roller 20. The blade 76 is pulled inwards by a spring 85 and is moved outwards by a cam 82 engaging with a roller 81 fixed to arms 78.