US1910037A - Bag sealing mechanism - Google Patents

Description

May 23, 1933. P. NAEHER 1,910,037

BAG 'SELING MECHANISM Filed Sept. 8, 1951 2 Sheets-Sheet 1 May 23, 1933. p, NAEHER 1,910,037

BAG SEALING MECHANISH Filed Sept. 8, 1951 2 Sheets-Sheet 2 'Patented May 2.3, 1933 UNITED STATES' PATENT oFFlcE PAUL NAEHEB, '0F CHICAGO, ILLINOIS, ASSIGNOR '.lO B. '.l. GUMP CO., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS :BAG sEALING MECHANISM Application :Bled September 8, 1931. Serial No. 561,623.

rllhis invention relates to tape applying mechanism for a bag sealing machine and primarily concerns itself with means for shaping and retaining the sides of the bag while the tape is being applied over the top and down the ends of the bag.

It has been found in practice that if the sides of the bag are not properly supported or retained from bulging outwardlv when the tape is being rolled over the top and over the ends of the bag, there is more or less kinking or distortion at the corners of the bag. lt is an obj ect of this invention to overcome this objection in the provision of side plates that move down in advance of the tape applying rollers for holding the sides of the bag against bulging while the rollers apply the tape.

The invention comprises the novel structure and combination of parts hereinafter described and more particularly set out and defined in the appended claims.

In the accompanying drawings which'illustrate a preferred form of this invent1on and in which similar reference numerals refer to similar features in the different views:

Figure 1 is a sectional view through a bag closing machine illustrating the tape applying mechanism in elevation.

Figure 2 is an enlarged sectional view taken upon the line II-II of Figure 1 looking in the direction of the arrows and showing parts in elevation.

Figure 3 is a fragmentary and elevational view of the machine upon an enlarged scale.

Figure 4 is a fragmentary sectional view taken upon the line IV-IV of Figure 1 looking in the direction of the arrow and showin# parts in elevation.

In order to illustrateA this invention, parts of the bag closing and sealing machine have been illustrated. The bag to be-folded and sealed is adapted to be conveyed along a longitudinally extending platform 1 having side rails 2. The platform is positioned a short distance below the table or bench 3 which supports the operating mechanism. A pair of vertical rods or standards 4 are supported upon the bench 3. A block 5 is mounted upon the standards 4 for reciprocating movement. This block 5 carries a lateral bar 0r support 6 upon which a pair of side plates 7 are adjustably mounted. These side plates have upper angle clips 8 which are attached to the support 6 by means of bolts 9 which pass through slots l() in the bar 6 whereby said plates may be laterally adjusted for different sizes of bags. Between the plates 7 there is a top plate 11 which is adapted for pressing against the top of the bag. Above the block 5 which in reality constitutes a cross-head, there is a-second cross-head 12 which is slidably mounted upon the standards 4. The cross-head 12 is normally urged upwardly against an adjustable stop 13 by means of coil springs 14. A pair of spaced shafts 15 are carried by the cross-head 12 for rotatable movement and each of the shafts 15 carries an arm 16 which has a tape applying roller 17 journaled thereon. These arms are normally pressed against the ends of the bag by means of a coil spring 18 which connects the two arms as shown in Figure 4.

The different crossheads are adapted to be reciprocated downwardly by the following mechanism:

A shaft 19 which is suitably journaled in the machine constitutes the driving shaft and this shaft is equipped with a segmental 'gear 2() having a cam ,21 attached to its rear face. The segmental gear 20 is adapted for engaging a rack 22 attached to the cross-head 12 and the cam 21 is adapted to engage a stud or roller 23 attached to the cross-head 5. Consequently, when the gear 20 is rotated the two cross-heads will be simultaneously lowered so that the plates 7 Will engage the sides of the bag and shape the same and retain it from bulging outwardly while the rollers 17 press the tape against the ends of the bag. As the cross-head 6 descends, the compression plate 11 will apply the tape upon the top of the bag.

In the drawings, there is shown a bag B having a piece of tape T applied over the top thereof by the compression plate 11 and the rollers 17. It will be appreciated that when these rollers 17 are yieldjngly compressed against the ends of the bag, they ap ly considerable pressure which tends to or distort the corners of the bagwhich are represented by the reference numeral 24. However, by the use ofthe side plates 7 which retain 'the side walls ofthe bag from spreading or bulging outwardly or being distorted, the distortion 'of the ba at the corners 24 is eliminated and avoide After a piece of tap'e has been applied t the` top 'of the bag, the cam 21 will pass the roller 23 and the teeth and gears 20 will pass out .of engagement` with the -rack 22, the springs 14 will-then elevate the cross-head 12, while the cross-head is adapted to be elevated by a coil spring-25 mounted upon one of the standards 4 beneath said cross-head as shown in Figure 4.

I am aware that many changes may be j made and numerous details of construction may be varied through a wide ran e with-- out departing from the principles o this invention, and I, therefore, do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

-1. In a bag sealing mechanism, a reciprocating member having a compression plate for engaging the top of the bag and having spaced lates for engaging the sides of the bag an a second reciprocating member hav-1 ing means for yieldingly engaging the ends of the bag. .p n

' 2. -In a bag sealing mechanism, a reciproi cating'crosshead having a laterally extending bar, a--pair of spaced plates adjustably carried by said bar, a compression plate mounted on said bar between said plates, a second reciprocatingcrosshead, spaced shafts carried by said crosshead, arms yieldingly mounted on and carried by said shafts, and'rollers carried by said armsfor engaging the ends of a bag.

3.` In a bag closing machine, a reciprocating member adapted for engaging the top and sides of the bag, a reciprocating member -having means for engaging the ends of the bag and means for simultaneously operating said reciprocating members.

' 4. In'a bag closing machine, a pair ci swingable arms, rollers carried thereby, means for supportin said arms for reciprocable movement, yie ding means connecting said arms, and a reciprocable member having a compression plate and a'pair of spaced plates extending transversely'to the axes of said rolls.

` 5. In a bag closing machine, a reciprocable -member having yielding rollers for apl plying tape to the ends of the bag, and means movable in advance of said 'rollers for engaging the sides of the bag.

' 6; In a bag sealing machine, a reciprocating member embod'ylng a compression plate for engaging the top of the bag, and a air ofspaced plates for engaging the sides o the bag, a second reciprocable member, arms pivoted to said second member, rollers carried by said arm for engaging the ends of the bag and yielding means connecting said arms.

7. In a bag sealing machine, the combination with a movable means for ap lying a piece of tape to the top of the bag, ci) a member movable in advance of said means for engaging the sides of said bag and embody- PAUL NAEHER. l

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