什么是(shi)裹背條，裹背條是(shi)通過皮殼機等機械用(yong)于精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)本(ben)的書(shu)(shu)(shu)(shu)(shu)脊部分，使書(shu)(shu)(shu)(shu)(shu)貼連(lian)接得(de)更加牢固。書(shu)(shu)(shu)(shu)(shu)脊制作弧長的計算，本(ben)器規(gui)格依書(shu)(shu)(shu)(shu)(shu)芯幅面(mian)大(da)小進行調定，以能將書(shu)(shu)(shu)(shu)(shu)芯平穩地送(song)進夾書(shu)(shu)(shu)(shu)(shu)裝(zhuang)置(zhi)內為標準。入本(ben)后的書(shu)(shu)(shu)(shu)(shu)冊不斜(xie)歪，四角垂直地頂齊在(zai)夾書(shu)(shu)(shu)(shu)(shu)裝(zhuang)置(zhi)的靠板(ban)、側規(gui)內。裁切尺寸正確一致，其質量要求與規(gui)格誤差與一般切書(shu)(shu)(shu)(shu)(shu)相同。

夾(jia)書簽絲(si)帶裝置安放在切(qie)書機與扒圓起脊機之間。即(ji)將切(qie)完的書芯(xin)，用(yong)(yong)分本器從中間分開，再由輸放絲(si)帶器將絲(si)帶夾(jia)入中心(xin)紙(zhi)書芯(xin)的中間靠訂(ding)縫一邊(bian)。絲(si)帶夾(jia)在書芯(xin)內(nei)兩端各留出(chu)粘邊(bian)和使用(yong)(yong)的余地，再經切(qie)刀（剪刀式）將其(qi)剪斷。

剪斷(duan)后(hou)的(de)(de)絲(si)帶(dai)(dai)，裹背(bei)條(tiao)(tiao)芯(xin)(xin)部分被(bei)下面(mian)(mian)膠(jiao)輥著膠(jiao)、壓實完(wan)成夾書(shu)(shu)(shu)(shu)簽(qian)絲(si)帶(dai)(dai)過(guo)程。書(shu)(shu)(shu)(shu)簽(qian)絲(si)帶(dai)(dai)的(de)(de)長(chang)度與(yu)一(yi)般手工加工長(chang)度基本相同，可依書(shu)(shu)(shu)(shu)冊幅(fu)面(mian)(mian)長(chang)度調(diao)定。扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)操作(zuo)及要求。書(shu)(shu)(shu)(shu)芯(xin)(xin)經裁切、夾粘(zhan)絲(si)帶(dai)(dai)（或不夾粘(zhan)絲(si)帶(dai)(dai)）后(hou)，繼續傳送（或翻(fan)轉變位）并(bing)做90°翻(fan)轉，使平(ping)放(fang)書(shu)(shu)(shu)(shu)芯(xin)(xin)變為(wei)后(hou)背(bei)朝上（或朝下）而(er)進入扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)機(ji)。扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)機(ji)的(de)(de)加工，其操作(zuo)分為(wei)兩步，但機(ji)器的(de)(de)結(jie)構是(shi)連在一(yi)起(qi)的(de)(de)，均是(shi)先扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)后(hou)起(qi)脊(ji)(ji)(ji)(ji)。扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)。扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)機(ji)在扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)時，由一(yi)組（或一(yi)對）圓(yuan)(yuan)(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)(shu)芯(xin)(xin)壓緊后(hou)作(zuo)相對旋轉動作(zuo)），使書(shu)(shu)(shu)(shu)背(bei)扒(ba)(ba)(ba)(ba)(ba)成適當規格圓(yuan)(yuan)(yuan)(yuan)(yuan)勢，加工成圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)書(shu)(shu)(shu)(shu)芯(xin)(xin)。書(shu)(shu)(shu)(shu)芯(xin)(xin)書(shu)(shu)(shu)(shu)背(bei)的(de)(de)形狀分為(wei)圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)有脊(ji)(ji)(ji)(ji)、圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)無脊(ji)(ji)(ji)(ji)和方背(bei)（或稱平(ping)背(bei)）三種。平(ping)裝裹背(bei)條(tiao)(tiao)書(shu)(shu)(shu)(shu)刊(kan)的(de)(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)不高出書(shu)(shu)(shu)(shu)芯(xin)(xin)平(ping)面(mian)(mian)，而(er)精(jing)裝書(shu)(shu)(shu)(shu)刊(kan)的(de)(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)一(yi)般要高出書(shu)(shu)(shu)(shu)芯(xin)(xin)的(de)(de)平(ping)面(mian)(mian)。書(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)分為(wei)真脊(ji)(ji)(ji)(ji)和假脊(ji)(ji)(ji)(ji)。

真(zhen)脊(ji)(ji)是(shi)(shi)利(li)用書(shu)背(bei)(bei)上下兩(liang)邊變形的(de)(de)弧度高(gao)出(chu)書(shu)芯(xin)平面；假(jia)脊(ji)(ji)則是(shi)(shi)利(li)用紙(zhi)板(ban)(ban)鑲在書(shu)背(bei)(bei)后形成的(de)(de)書(shu)脊(ji)(ji)，書(shu)脊(ji)(ji)的(de)(de)脊(ji)(ji)高(gao)等于(yu)封面紙(zhi)板(ban)(ban)的(de)(de)厚度。方(fang)背(bei)(bei)書(shu)芯(xin)。是(shi)(shi)指書(shu)芯(xin)的(de)(de)書(shu)背(bei)(bei)平直方(fang)正。書(shu)背(bei)(bei)不突出(chu)，與平裝書(shu)刊的(de)(de)書(shu)背(bei)(bei)基本相似。

背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)上(shang)下環(huan)襯互成(cheng)直角，由于(yu)(yu)精(jing)(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)是用(yong)鎖線(xian)訂(ding)訂(ding)連，每一(yi)(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)(tie)的(de)(de)(de)(de)訂(ding)口折(zhe)縫里面都用(yong)線(xian)串過，因此(ci)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)(bei)(bei)脊(ji)比(bi)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)(tie)其(qi)它部(bu)(bu)分(fen)要厚(hou)(hou)(hou)一(yi)(yi)些(xie)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍的(de)(de)(de)(de)帖(tie)(tie)數越(yue)多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)其(qi)它部(bu)(bu)分(fen)厚(hou)(hou)(hou)度的(de)(de)(de)(de)差別(bie)也越(yue)大。所(suo)以方(fang)背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)(de)(de)(de)形式一(yi)(yi)般只用(yong)于(yu)(yu)厚(hou)(hou)(hou)度約為20mm的(de)(de)(de)(de)精(jing)(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍。圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有脊(ji)又(you)稱(cheng)(cheng)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)真脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)(bei)(bei)部(bu)(bu)呈圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)弧(hu)形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)高(gao)起有脊(ji)壟(long)，堅硬挺實(shi)，這(zhe)種書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)的(de)(de)(de)(de)形式適(shi)合于(yu)(yu)裝訂(ding)較厚(hou)(hou)(hou)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍，裝上(shang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)后(hou)有明顯的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻(fan)閱方(fang)便。目前我(wo)國的(de)(de)(de)(de)精(jing)(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍多采(cai)用(yong)這(zhe)種圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有脊(ji)的(de)(de)(de)(de)加工形式。圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)無(wu)脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)無(wu)脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)又(you)稱(cheng)(cheng)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)假脊(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)(bei)(bei)部(bu)(bu)呈圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)弧(hu)形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)(de)(de)(de)厚(hou)(hou)(hou)度相同，堅實(shi)挺括，但沒(mei)有書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)條脊(ji)。這(zhe)種形式的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)，一(yi)(yi)般常與軟(ruan)質(zhi)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)或塑料壓制而成(cheng)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)相配套。中(zhong)心(xin)(xin)紙有些(xie)機器還沒(mei)有沖圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)裝置，即將(jiang)方(fang)背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)進(jin)行沖圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)加工，作初步定型(xing)。先(xian)根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)厚(hou)(hou)(hou)度和中(zhong)心(xin)(xin)紙幅面大小調定好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器及扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)輥(gun)（或沖圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)裝置）的(de)(de)(de)(de)規矩，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)進(jin)入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器內并送到(dao)扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)輥(gun)之間，將(jiang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)扒(ba)(ba)擠成(cheng)一(yi)(yi)定圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)勢。